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Ingredient Glossary · Aroma Chemicals

Coumarin

2H-1-Benzopyran-2-one · Benzopyrone Lactone · CAS 91-64-5

Meethi Ghaas ki Khushboo (‍میٹھی گھاس کی خوشبو‍) — the sweet, powdery hay-almond molecule that birthed modern perfumery in 1882. IFRA-Restricted benzopyrone lactone; the backbone of the fougère family and every great Pakistani masculine oriental. Complete scientific, olfactory, and Pakistani formulation reference.

CAS
91-64-5
Identifier
~0.5
ppb
Odour Threshold
IFRA
Restricted
51st Amend.
Scroll
Quick Reference

At a Glance

Common Names
Coumarin · 2H-Chromen-2-one · Cumarin · Tonka Bean Camphor · Benzo-alpha-pyrone · 1-Benzopyran-2-one
CAS / EINECS / FEMA
CAS 91-64-5 · EC 202-086-7
FEMA 2381 (historical; food use now prohibited)
InChI Key: ZYGHJZDHTFUPRJ-UHFFFAOYSA-N
Molecular Formula
C₉H₆O₂ · MW 146.14 g/mol
Fused bicyclic: benzene ring + α-pyrone lactone
Degree of unsaturation: 7
Physical Form
Colourless to white crystalline powder or flakes · MP 69–71°C · BP 299–301°C · Density 0.935 g/cm³ (liquid at >71°C)
Flash Point / Log P
Flash point 151°C (closed cup)
Log P 1.39 — moderately lipophilic; good skin substantivity
Refractive Index / RI
n₂⁰D: 1.601–1.604 (liquid at 75°C)
Purity: >99.0% GC (pharma/fragrance grade)
Solubility
Insoluble in cold water · Fully soluble in ethanol, DPG, IPM, hot water · Dissolve powder in warm DPG (40°C) before adding to cold-process attar bases
Halal Status
✓ Halal-Suitable — Perkin condensation of petrochemical salicylaldehyde + acetic anhydride. No animal inputs, no ethanol in product, no haram processing at any stage
Odour Character
Sweet, powdery, hay-like · Almond, marzipan · Warm vanilla · Tonka warmth · Meethi Ghaas (میٹھی گھاس) · Badam (بادام) · Dried sweet clover; mithai shop warmth
Odour Threshold
~0.5–1.0 ppb in air — potent at heart/base use levels · Effective at 1–5% in compound · Does not create off-notes until >10% where medicinal facets emerge
IFRA Status (51st)
⚠️ RESTRICTED — 51st Amendment (June 2023). Category 4 (Fine Fragrance): ~1.0% in finished product. Category 5A (Leave-on): ~0.2–0.3%. Always back-calculate from compound to finished product.
EU Allergen Status
⚠️ LISTED under EU Reg. 2023/1545 — mandatory declaration as COUMARIN on label above 0.001% in leave-on products & 0.01% in rinse-off products. Relevant for EU/UK export.
Natural Occurrence
Tonka bean (Dipteryx odorata, 1–1.5%) · Sweet woodruff · Cassia cinnamon (up to 9,300 mg/kg) · Lavender (trace) · Sweet clover (Melilotus officinalis)
Shelf Life (sealed)
3–5 years sealed, cool, dark · 10% DPG solution: up to 5 years · Powder risk: yellowing from UV, caking from humidity · Store in amber glass + desiccant
Introduction

The Molecule That Invented Modern Perfumery

Coumarin is not merely an aroma chemical — it is the founding act of modern perfumery. When French perfumer Paul Parquet incorporated it into Houbigant’s Fougère Royale in 1882, he created the world’s first fine fragrance to contain a synthetic molecule, shattering the ancient assumption that luxury perfumery required exclusively natural materials. That single creative decision birthed the Fougère fragrance family — the single most commercially dominant category in men’s perfumery for over 140 years — and established Coumarin as the backbone of modern aromatic composition. From Guerlain Shalimar (1925) to Angel by Thierry Mugler (1992), from Brut (1964) to Cool Water (1988), Coumarin has been present at every pivotal turn in fragrance history, adapting to each era while maintaining its essential identity: the sweet, enveloping warmth of hay, almond, and tonka.

For Pakistani formulators — attar makers in Lahore’s old city, EDP compounders in Karachi’s Jodia Bazaar, artisan perfumers targeting Gulf export — Coumarin is the single most strategic acquisition in the aroma chemical palette. Its olfactory archetype — warm, sweet, enveloping, and enduring — is precisely the character that Pakistani consumers rank highest in masculine fragrance preference surveys. Its synergy with Oud, Sandal, Gulab (rose), Khas (vetiver), and Zafran (saffron) makes it the natural “bridge” between traditional South Asian botanical ingredients and Western fragrance structure. At 2–3% in a DPG attar or 3–5% in an EDP compound, Coumarin transforms a competent blend into something genuinely memorable: warm, fixative, and projecting with that unmistakable Meethi Ghaas sweetness that lingers for hours on skin and days on cotton kameez fabric. Bio Shop™ Pakistan stocks pharmaceutical-grade Coumarin powder (>99% GC) and a convenient 10% DPG dilution for hobbyists and small-scale formulators requiring safe micro-dosing.

Bio Shop™ Pakistan — Sourcing Note

Bio Shop™ Pakistan stocks two formats: pharmaceutical-grade Coumarin Powder (>99% GC purity) for professional formulators working at 1%+ in compound, and Coumarin 10% in DPG solution for hobbyists and precision micro-dosing at sub-1% levels. Both sourced from ISO 9001-certified Chinese manufacturers with full GC CoA documentation. Note: Coumarin is IFRA-Restricted (51st Amendment) — always back-calculate from compound to finished product before commercial release. Visit bioshop.pk/products/coumarin-powder and bioshop.pk/products/coumarin-10-in-dpg for current stock and pricing.

Molecular Identity

Chemical Identification

IUPAC Name2H-1-Benzopyran-2-one (also: 2H-chromen-2-one)
CAS Number91-64-5
EINECS / EC202-086-7
FEMA NumberFEMA 2381 (historical; food use now prohibited in EU, USA, Pakistan)
InChI KeyZYGHJZDHTFUPRJ-UHFFFAOYSA-N
SMILESO=C1OC2=CC=CC=C2C=C1
Formula / MWC₉H₆O₂ · 146.14 g/mol · Degree of unsaturation: 7
Structural ClassBenzopyrone · Aromatic Lactone · Heterocyclic organic compound (fused bicyclic)
Functional GroupsLactone (cyclic ester) · α,β-unsaturated carbonyl · Aromatic benzene π-system · C2v symmetry
Synthesis RoutePerkin Reaction: salicylaldehyde + acetic anhydride, Na-acetate catalyst, 170–185°C; Knoevenagel condensation → intramolecular lactonisation → recrystallisation >99% GC
Natural OccurrenceTonka bean (Dipteryx odorata, 1–1.5%) · Cassia cinnamon (up to 9,300 mg/kg) · Sweet woodruff (Galium odoratum) · Lavender (trace)
Olfactory ReceptorOR1A1 (“hay receptor”) · OR51E1 · OR2W1 (likely) — planar aromatic scaffold is key steric determinant; dihydrocoumarin (saturated C3=C4) gives coconut instead of hay
First Isolated1820 — August Vogel (Munich) & Gaston Guibourt (Paris), from tonka beans (Dipteryx odorata)
First Synthesised1868 — Sir William Henry Perkin (Perkin Reaction); industrial production by 1877; first used in fine fragrance 1882 (Fougère Royale)
Urdu / PakistanMeethi Ghaas ki Khushboo (میٹھی گھاس کی خوشبو) — fragrance of sweet mown hay, with Badam (بادام) almond warmth
Grade & Purity Profiles

Four Commercial Grades

Coumarin reaches Pakistani formulators in four distinct market configurations. Bio Shop™ Pakistan stocks pharmaceutical/fragrance grade powder (>99% GC) and a 10% DPG solution — the two professional formats. Understanding the differences protects against the adulterated or substandard material occasionally present in Pakistan’s grey-market aroma chemical supply.

Professional Standard · Bio Shop™ Grade
Pharma/Fragrance Grade
>99.0% GC purity · White crystalline powder · MP 69–71°C · ISO 9001 certified
GC Purity
>99%
Acid value ≤1.0 · MP 69–71°C sharp · o-vinylphenol <0.05% · GC CoA with batch
"The correct grade for all fine fragrance, attar, and personal care formulation. Clean sweet-hay-almond on blotter; warm tonka dry-down. Bio Shop™ Pakistan primary stock. GC certificate on request. Use pure powder at 1%+ in compound; use 10% DPG for doses below 1%."
Convenience Format · Bio Shop™ Stock
10% in DPG Solution
>99% active in DPG · Clear, mobile liquid · Pre-dissolved · Ideal micro-dosing
Active Coumarin
10%
Same purity in active fraction; 10x easier to weigh for sub-1% compound dosing
"1g of 10% DPG solution = 0.10g actual Coumarin. Critical formula adjustment: if target is 0.3% Coumarin in finished lotion, weigh 3.0% of 10% solution. Eliminates measurement error at hobby-grade scale precision. Ideal for personal care (0.1–0.5% in finished product) and light EDT compounds."
Substandard · Avoid for Fine Fragrance
Technical Grade
96–98% GC · May contain o-vinylphenol >0.5% · Phenolic off-note risk
GC Purity
96–98%
Residual salicylaldehyde & o-vinylphenol may cause sensitisation at sub-IFRA levels
"The most common form of substandard Coumarin in Pakistani grey-market imports. At 2–4% impurity, the aroma profile includes a harsh, phenolic or medicinal off-note on blotter. Not suitable for fine fragrance or any personal care formulation. Melting point test: sharp 69–71°C melt indicates good purity; broadened or depressed melt indicates technical grade."
⚠ Avoid Without Verification
Adulterated / Unknown
Pakistan grey market · DPG dilution · Dihydrocoumarin sub · Vanillin masking
Actual Purity
Unknown
Melts outside 69–71°C; coconut note = dihydrocoumarin; powder yellows on storage
"Common adulterations: (1) dilution with DPG or Benzyl Benzoate reducing active content; (2) substitution with dihydrocoumarin (softer, coconut-like aroma, not hay); (3) added Vanillin or Ethyl Vanillin masking low purity. Blotter test: pure Coumarin gives clean sweet-hay with almond; no phenolic, no coconut, no direct vanilla. Melting point is the fastest field check."
Dosage Science

Concentration Behaviour

Unlike ultra-trace materials (Allyl Caproate, Allyl Amyl Glycolate) where ppb-range potency demands extreme caution, Coumarin operates at comfortable ppm-range use levels that match its IFRA-Restricted status. Its odour threshold of ~0.5–1 ppb means it is perceptible at very low concentrations, but its hedonic profile is linear and additive rather than inverted — more Coumarin generally means more warmth and sweetness, up to the point where medicinal facets emerge above 5–10% in compound. Pakistani formulators report that 2–3% in compound is the “sweet spot” for traditional masculine attar work; 3–5% for rich oriental EDPs; and 0.5–1.5% for contemporary men’s EDT or unisex compositions. IFRA limits apply to the finished product — always back-calculate.

0.1–0.5% in CompoundSubliminal Sweetener
Acts as global modifier; adds abstract warmth and smoothness without perceptible hay character. Softens sharp citrus and lavender edges. Ideal for feminine florals, fresh EDTs, and aquatic compositions needing a subtle warmth anchor. No risk of exceeding IFRA limits at standard compound usage rates.
0.5–1.5% in CompoundGentle Fougère Warmth
Subtle hay-powder facet becomes perceptible; provides backbone support for lavender and herbal notes; sweet-powder warmth without asserting a strong individual identity. Ideal for light fougères, men’s EDT, floral-oriental bridges, and shower gel compounds. At 15% compound in EDT = 0.075–0.225% in finished product — well within IFRA Category 4 limits.
1.5–3.0% in CompoundClassic Fougère Backbone
Pronounced hay-almond character; warm tonka sweetness fully expressed; the structural core of every great fougère composition. Standard dosage for Pakistani masculine attars and oriental EDP compounds. At 20% compound in EDP = 0.3–0.6% in finished product — within IFRA Category 4 indicative limit (~1.0%).
3.0–5.0% in CompoundRich Oriental Warmth
Rich gourmand warmth; strong almond-marzipan; prominent tonka-hay; sillage and longevity maximised. Dominant but not overwhelming if well-anchored by musks and ambers. Ideal for intensive oriental attar bases, heavy EDP compounds, and bakhoor blends. Back-calculate carefully: 5% at 20% compound = 1.0% in EDP — at IFRA indicative limit.
5.0–10.0% in CompoundSpecialist Use — Verify IFRA
Very pronounced; may approach medicinal territory unless well-anchored by heavy musks and balsamic materials. Suitable for specialist oriental concentrates and bakhoor bases only. Verify IFRA back-calculation before commercial release: at 20% compound in finished product, 8% in compound = 1.6% in finished product — exceeds typical Category 4 indicative limits.
Above 10% in CompoundIFRA Non-Compliant Risk
Very dominant; medicinal, harsh facets emerge; IFRA limits almost certainly exceeded in any realistic finished product scenario. Use only for abstract accord exploration or specialist reference work. Never use in commercial formulation at this level without explicit IFRA compliance review and finished-product back-calculation.
Sensory Analysis

Olfactory Evolution

Opening · 0–5 min
Sweet Hay Opening
Coumarin opens with a crystalline, dry sweetness — a clean, powdery arrival with the faintest bitter-herbal crispness that immediately evokes the distinctive fragrance of sun-dried meadow grass or freshly harvested sweet clover from a Pakistani pansari shop. There is nothing aggressive or ozonic; it settles like a warm shawl. In Lahore’s winter mornings (8–15°C), this opening projects with particular clarity — cooler temperatures allow the full hay-almond character to express without the heat amplification that accelerates the top-note stage in summer. The initial impression always carries that faint almond-marzipan quality that earned it the Urdu name Meethi Ghaas — sweet grass, warm and comforting.
Heart · 5–30 min
Almond Marzipan Warmth
As the initial crisp dryness softens, Coumarin’s defining heart character emerges fully: a warm, smooth hay-almond accord with the rich marzipan quality of Badam halwa — the beloved Pakistani winter confection of almond and sugar, warm from the karahi. The vanilla facets deepen, creating a tonka-like richness that perfumers describe as “the sweetness that gives fougères their soul.” This is the phase that defines Coumarin’s commercial role: at 2–3% in a compound, this warm heart character projects for the core 20–30 minutes of fragrance development, where first impressions are formed and fragrance identity is established. Pakistani masculine consumers wearing Coumarin-forward attars at Eid or Baraat ceremonies experience this phase as deeply luxurious and impressive — exactly the social function traditional Pakistani fragrance is designed to serve.
Dry-down · 30 min–2 hr
Creamy Powder Accord
Coumarin’s dry-down is where its fixative value is fully appreciated. As top and heart volatiles evaporate, Coumarin remains — its relatively high boiling point (299–301°C) ensuring an exceptionally slow release. The character transitions from the assertive hay-almond of the heart to a soft, creamy powder: warm, slightly amber-sweet, with a whisper of tobacco warmth that connects it to the classic British and French fougères of the 1960s–80s. On Pakistani skin during winter (Lahore, November–February), this powdery dry-down phases evolve over 1–2 hours into an intimate, skin-close warmth that is deeply wearable. Coumarin’s moderate lipophilicity (Log P 1.39) creates an effective skin depot in the stratum corneum lipid layer, from which it releases slowly for hours — the science behind its extraordinary substantivity.
Base · 2–8 hr+
Vanillic Ghost
In the deep dry-down, Coumarin becomes a dusty, intimate warmth — a soft vanillic sweetness that clings to skin and fabric well beyond the active fragrance phase. On Pakistani cotton kameez fabric, Coumarin’s substantivity is truly extraordinary: trained evaluators consistently detect its sweet-hay ghost on cotton for 24–48 hours after application, explaining why Coumarin-forward masculine attars have a disproportionately lasting fabric presence that Pakistani consumers prize. This fabric-based persistence is not merely olfactory — it is cultural. The lingering sweetness of a man’s sherwani from a wedding celebration, carrying the warmth of his attar into the following day, is a deeply cherished sensory memory in Pakistani culture. Coumarin, more than any other synthetic ingredient, creates this effect consistently and affordably.
Sweet Hay Powdery Almond Marzipan Tonka Warmth Vanilla Warm Herbaceous Fougère Gourmand Meethi Ghaas (میٹھی گھاس) Enduring Warmth
Formulation Accords

Three Complete Formulas

Three production-ready formulas from the Bio Shop™ Pakistan reference document — exact weights, exact percentages. All ingredients available at bioshop.pk. Formula 1 is a DPG attar (no alcohol — halal for all markets). Formula 2 is a classic fougère EDP compound using Perfume Premix as the sole alcohol base. Formula 3 is a body lotion personal care compound. All formulas include IFRA back-calculation notes for commercial compliance.

Meethi Ghaas Attar  ·  میٹھی گھاس
Pakistani DPG Attar · No alcohol · 100g batch · Roll-on dabba · Urban Pakistani males, Eid & Jumma use
Coumarin Powder (>99% GC)2.0g  2.0%
Linalool (pure)1.5g  1.5%
Vanillin (pure powder)1.5g  1.5%
Iso E Super (pure)3.0g  3.0%
Benzyl Benzoate (pure)8.0g  8.0%
Oakmoss 10% DPG5.0g  5.0%
Lavender Essential Oil4.0g  4.0%
Tonka Bean Oil (pure)2.0g  2.0%
Dipropylene Glycol (DPG)73.0g  73.0%
Method
1. Warm DPG to 40°C. 2. Dissolve Vanillin powder completely in warm DPG (stir 5 min). 3. Add Coumarin powder — stir until fully dissolved (both dissolve readily in warm DPG). 4. Add all liquid ingredients in order listed. 5. Mix 15 min. 6. Transfer to amber glass; rest 48 hours before evaluating. 7. Filter if cloudy. Longevity: 6–8 hours on skin. Oakmoss 10% DPG at 5.0g = 0.5g actual oakmoss (0.5% in attar). IFRA: Coumarin 2% in DPG attar = 2% in finished product; verify IFRA Category 12 (non-skin contact) or Category 5B (oil/attar) limits for your specific use occasion.
Hayati Cedar  ·  حیاتی سیٖته
Classic Fougère EDP Compound · Perfume Premix base · 100g compound · Gulf-export / urban professional 25–45
Coumarin Powder (>99% GC)3.0g  3.0%
Lavender Essential Oil8.0g  8.0%
Iso E Super (pure)10.0g  10.0%
Linalool (pure)5.0g  5.0%
Linalyl Acetate (pure)5.0g  5.0%
DHM — Dihydromyrcenol (pure)8.0g  8.0%
Vanillin (pure powder)2.0g  2.0%
Benzyl Benzoate (pure)10.0g  10.0%
Oakmoss 10% DPG10.0g  10.0%
DPG (balance)39.0g  39.0%
Finished Bottle — Perfume Premix Only
EDP (20%): 20g compound + 80g Perfume Premix  ·  EDT (15%): 15g + 85g  ·  EDC (10%): 10g + 90g. Warm compound to 35°C to dissolve Vanillin and Coumarin; cool before adding Perfume Premix. Rest 2–4 weeks sealed, cool, dark. Cold-filter 0.45μm before bottling. ⚠ IFRA back-calculation: Coumarin 3% × 20% compound in EDP = 0.6% in finished EDP. IFRA 51st Amendment Category 4 (Fine Fragrance) indicative limit ~1.0% — ✓ Compliant. EDT: 3% × 15% = 0.45% — ✓ Compliant. Longevity: EDP 6–8 hours; sillage: moderate-strong masculine fougère.
Sabz Taaza Body Lotion  ·  سبز تازه
Fresh Fougère Body Lotion Compound · Use in O/W lotion base · 100g compound batch · Daily office & personal care use
Coumarin 10% in DPG (solution)3.0g  3.0%
Lavender Essential Oil0.2g  0.2%
Linalool (pure)0.3g  0.3%
DHM — Dihydromyrcenol (pure)0.2g  0.2%
Polysorbate 202.0g  2.0%
Unscented O/W Lotion Base94.3g  94.3%
Usage — Finished Lotion (100g)
1. Mix fragrance ingredients with Polysorbate 20; stir clear. 2. Add to lotion base at room temperature; mix gently 5 min, avoid aeration. 3. pH check: target 5.0–6.0; adjust with citric acid if needed. 4. Fill and equilibrate 24 hours. Note: Coumarin 10% DPG at 3.0g = 0.30g actual Coumarin in 100g lotion = 0.30% in finished product. ⚠ IFRA back-calculation: 0.30% Coumarin in leave-on lotion — at indicative Category 5A limit (~0.2–0.3%). Formulate conservatively; verify current IFRA 51st Amendment for your specific product category. ⚠ EU allergen: COUMARIN must be declared on label (above 0.001% leave-on threshold). Fragrance perceptible 3–5 hours post-application.
Synergies

Classic Pairings

Coumarin is one of the most broadly compatible aroma chemicals in the palette, integrating positively with floral, herbal, woody, oriental, and gourmand materials. The following represent the most commercially validated pairings for Pakistani formulation, drawn from the reference document. All pairings include compound percentage ratios.

Fougère Foundation — The Classic Trio
Lavender EO · 5–10%+Coumarin 2–3% → The fougère accord. Classic since 1882. Crisp herbal opens; warm hay settles. Oakmoss 10% DPG · 2–4%+Coumarin 2–3% → Earthy mossy depth vs sweet hay. Chypre-fougère bridge. Linalool · 3–5%+Coumarin 1.5–2% → Modern fougère freshener. Cleaner, less camphor than lavender. Linalyl Acetate · 3–5% → Lavender-bergamot top note bridge to Coumarin heart.
Oriental Sweetness — Pakistani Attar Palette
Vanillin · 2%+Coumarin 2% → Shalimar-inspired duo. Sweet pillars of fine orientals. Tonka Bean Oil · 0.5–1%+Coumarin 2–3% → Natural complexity over synthetic backbone. Benzyl Benzoate · 5–10% → Oriental fixative duo. Extends longevity of entire composition. Iso E Super · 3–5%+Coumarin 1.5–2% → Contemporary woody-sweet. Cedar-lined room in winter.
Base Anchors — Gulf Export Oriental
Sandalwood EO · 5–10%+Coumarin 2% → Sandal-sweet-hay accord. Gulf market staple. Patchouli EO · 2–4%+Coumarin 2–3% → Earthy-oriental; Coumarin rounds patchouli’s earthy edge. Vetiver EO · 1–3% → Khas rootiness + Coumarin sweet warmth = classic Pakistani masculine. Cardamom EO · 0.5–1.5% → Spice-sweet bridge. Elevates oriental compositions for Gulf export.
Fixative Partners & Carriers
DPG · Primary attar carrier; solvent for dissolving Coumarin powder at 40°C Perfume Premix · Sole alcohol base for EDP/EDT sprays Galaxolide · 1.5–3% → Clean musk bloom. Coumarin+Galaxolide: longevity duo for attar bases. Ethylene Brassylate · 2–3% → Macrocyclic musk warmth complements Coumarin’s dry-down.
Benchmarking

Coumarin vs. Alternatives

Tonka Bean Oil
Natural NCS · Coumarin ~3–5% w/w · Plus vanilla, tobacco, heliotropin
Aroma vs. Coumarin
Richer, more complex; tobacco-balsamic-vanilla facets; less linear; genuine naturalness
Cost / IFRA
USD 400–800/kg (vs USD 8–20/kg for synthetic) · ⚠ Also IFRA Restricted
Use With Coumarin
Add 0.5–1% Tonka Bean Oil alongside 2–3% Coumarin for naturalistic complexity and depth
Pakistan Application
Premium niche attars; naturals-focused luxury brands; Gulf export positioning around “natural” tonka
Verdict: Best used together. Synthetic Coumarin provides clean, consistent backbone; Tonka Bean Oil adds the supporting aromatic notes (vanilla, tobacco, heliotropin) for full-spectrum authenticity. Available at bioshop.pk/products/tonka-bean-oil
Vanillin
Phenolic Aldehyde · 4-Hydroxy-3-methoxybenzaldehyde · CAS 121-33-5
Aroma vs. Coumarin
Direct, sweet vanilla character; creamy; no hay, no powder, no almond marzipan quality
Cost / IFRA
~USD 5–15/kg · ⚠ IFRA Restricted; EU allergen-listed in some member state frameworks
Use With Coumarin
Essential pairing: Vanillin 2% + Coumarin 2% = the oriental sweetness engine; more 3-dimensional than either alone
Pakistan Application
Together: sweet oriental attar bases, Shalimar-inspired compositions, wedding gift EDPs for all markets
Verdict: Complementary, not interchangeable. Vanillin provides vanilla; Coumarin provides hay-almond-powder. The classic oriental sweet base uses both. Available at bioshop.pk/products/vanillin
Dihydrocoumarin
Reduced Lactone · C3–C4 saturated · CAS 119-84-6
Aroma vs. Coumarin
Softer, coconut-lactone character; no hay dryness; gentler, more feminine sweet warmth
Cost / IFRA
Similar to Coumarin · ⚠ IFRA Restricted separately; verify its own limits
Use With Coumarin
Partial replacement at 0.5–1% to soften Coumarin’s hay quality when a more coconut-sweet character is needed
Pakistan Application
Feminine floral-oriental bases; coconut-adjacent summer accords; softer unisex compositions for Karachi market
Verdict: Demonstrates the structural importance of the C3=C4 double bond in Coumarin. Saturation of this bond shifts the character from hay to coconut. Not currently stocked at Bio Shop™ Pakistan; check bioshop.pk for availability updates.
Heliotropin (Piperonal)
Methylenedioxy-benzaldehyde · CAS 120-57-0 · Cherry-almond powdery
Aroma vs. Coumarin
Sweet almond-cherry-heliotrope; powdery; floral-oriented; no hay dryness; more perfumy-sweet
Cost / IFRA
~USD 10–20/kg · ⚠ IFRA-listed ingredient; verify limits per product category
Use With Coumarin
Cherry-almond duet: Heliotropin 1–1.5% + Coumarin 1.5–2% = powdery sweet almond accord of exceptional depth
Pakistan Application
Wedding and Eid fragrance compositions; powdery oriental feminine; almond-sweet Pakistani confectionery accord (Badam halwa)
Verdict: Heliotropin’s cherry-almond character complements Coumarin’s hay-almond for a fuller powdery accord. Together they create the sweet powdery depth found in classic Paris orientals. Available at bioshop.pk/products/heliotropin
Safety & Regulations

IFRA & Safety Overview

Educational summary of publicly available regulatory data as of 2024. Always consult the current IFRA Standards (51st Amendment), the ingredient Safety Data Sheet, RIFM Safety Database, and your regulatory advisor before commercial formulation. This document does not constitute regulatory or safety advice. IFRA limits are expressed as a percentage in the finished consumer product — always back-calculate from compound to finished product.
⚠️

IFRA 51st Amendment — RESTRICTED Ingredient

Coumarin is classified as RESTRICTED under the IFRA 51st Amendment (notified 30 June 2023), based on potential skin sensitisation assessed using the QRA2 (Quantitative Risk Assessment 2) methodology. Maximum use levels apply to the finished consumer product. Indicative limits: Category 4 (Fine Fragrance) ~1.0% in finished product; Category 5A (Body Lotion/Leave-on) ~0.2–0.3%; Category 5C (Hair products) ~0.2–0.5%; Category 7A (Rinse-off body wash) ~0.5–1.0%; Category 11 (Air Freshener/Diffuser) ~0.5–2.0%. Always consult the full IFRA 51st Amendment Standards document for your specific product categories and perform back-calculation before commercial release.

⚠️

EU Allergen Declaration — Mandatory COUMARIN Labelling

Under EU Cosmetics Regulation 2023/1545 (amending Regulation EC 1223/2009), Coumarin is listed as a mandatory fragrance allergen. Declaration of “COUMARIN” on cosmetic product ingredient lists is required when present above: 0.001% (10 ppm) in leave-on products; 0.01% (100 ppm) in rinse-off products. At typical formulation use levels (1–5% in compound at 0.5–20% compound in finished product), Coumarin concentration will almost always exceed these thresholds. Pakistani manufacturers exporting to EU or UK must declare COUMARIN as an ingredient. Monitor EU Cosmetics Regulation amendment updates through IFRA or an EU regulatory consultant.

✅

Pakistan DRAP & Halal — Fully Compliant

No current restriction under Drug Regulatory Authority of Pakistan (DRAP) cosmetics guidelines specific to Coumarin as a fragrance ingredient. Pakistani formulators for the domestic market may use Coumarin within IFRA limits freely. Halal status confirmed: commercial fragrance-grade Coumarin is produced entirely via the Perkin condensation of petrochemical salicylaldehyde (from phenol/benzene petroleum chemistry) and acetic anhydride (from ketene/acetic acid chemistry). No animal-origin materials, no ethanol in the final product, no haram processing at any stage. The synthesis reagents — sodium acetate catalyst, mineral acid workup — are entirely inorganic or petrochemical. Bio Shop™ Pakistan can provide manufacturer Halal compatibility documentation on request for professional accounts.

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Human Safety Profile — RIFM Assessment

Acute oral LD₅₀ in rats: 293 mg/kg (relatively low acute oral toxicity category). RIFM Expert Panel supports use within IFRA limits; sensitisation concern at above-limit concentrations is the basis for restriction. Skin sensitisation reactions reported in small percentage (<1%) of exposed population at above-limit concentrations; not a concern at IFRA-compliant use levels. Hepatotoxicity demonstrated in rodents at high doses; metabolic pathway in humans (7-hydroxycoumarin pathway) is of lower toxicity concern than rat pathway. Not classified as carcinogen (IARC unclassified); not classified for reproductive toxicity or mutagenicity at typical use levels. GHS Classification: H317 (may cause allergic skin reaction); H302 (harmful if swallowed). Handle in ventilated workspace; avoid eye and mucous membrane contact; wash skin with soap after prolonged contact.

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USA Regulatory — FEMA Food Prohibition

Coumarin carries an unusual historical footnote in US regulation: it was formerly on the FEMA GRAS list for food use (FEMA 2381) but was removed by the FDA in the 1950s following rodent liver toxicity evidence. Its use as a fragrance ingredient (not food) remains fully legal in the USA under RIFM safety guidelines within IFRA limits. This food prohibition is also in effect in the EU and Pakistan. Pakistani formulators: Coumarin must never be promoted or incorporated as a food-grade ingredient, flavouring, or food additive — its legitimate use is exclusively in fragrance, cosmetics, and home fragrance applications.

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Stability Precautions — Light, Alkali, Heat

Coumarin is chemically stable under normal conditions but requires protection from: (1) UV/light exposure — absorbs near-UV (~274 nm, ~311 nm), causing yellowing and aroma degradation; use amber glass or opaque HDPE storage. (2) Strong alkali — the lactone ring saponifies above pH 10 to form odourless o-coumaric acid; do not incorporate in cold-process soap bases at full alkalinity; add at trace/post-cure. (3) Excessive heat — stable to 69°C (melting point); above this it liquefies but remains chemically intact if sealed; prolonged storage at 40°C+ causes powder caking in humid conditions. Flash point 151°C — well above candle-wick temperatures; suitable for candle and diffuser applications within standard limits.

Handling & Storage

Storing in Pakistan’s Climate

Temperature
Below 25°C ideal; 15–20°C optimal for powder. Coumarin melts at 69–71°C but softens and cakes at 40°C+ if humid. Above 40°C: store in cooled, air-conditioned environment at all times
Container Type
Sealed amber glass jar (UV protection, best for powder) or opaque HDPE with UV-protective liner. Never use PVC or reactive plastics. Avoid copper or iron vessels. Keep container sealed when not in use
Light Exposure
Primary degradation risk for Coumarin. UV radiation (UV index 8–11+ in Pakistan March–October) causes yellowing and aroma degradation. Inner room or dark cupboard mandatory. Amber glass is the best protection for long-term storage
Shelf Life (sealed)
Powder: 3–5 years ideal conditions; 2–3 years typical Pakistani ambient storage. 10% DPG solution: up to 5 years sealed. Signs of degradation: yellowing, phenolic or medicinal off-note, caking or discolouration of powder
Measuring Technique
Powder at 1%+: weigh directly on 0.01g balance (1g per 100g compound is easily managed). Below 1%: use 10% DPG solution — 1g solution = 0.10g actual Coumarin. Critical adjustment: always recalculate formula when switching from pure powder to 10% solution
Pre-use Handling
Dissolve Coumarin powder in warm DPG (40°C) before adding to cold-process attar bases — stir 5 min until fully clear. For EDP compound: dissolve in warm DPG fraction first, then cool before adding to Perfume Premix. Never add undissolved Coumarin powder directly to cold DPG attar
Lahore Summer (May–Aug)
Ambient 38–45°C. Active cooling essential — Coumarin powder cakes at 40°C+ if trace humidity present. Never store in vehicles in summer heat. Use insulated storage for transport. Request early-morning delivery. Cooled storeroom (<30°C) is minimum standard
Karachi Coastal Climate
High humidity (75–90% RH year-round) accelerates powder caking — hygroscopic moisture can cause Coumarin crystals to clump and eventually melt to a paste at high RH + heat. Seal immediately after each use; use silica desiccant packets in storage containers; check containers periodically for moisture. The 10% DPG solution format is inherently more humidity-resistant than dry powder for Karachi storage
⚠ Adulteration check: Genuine Coumarin (>99% GC) is white to off-white crystalline powder at room temperature, melting sharply to a clear liquid at 69–71°C. Field tests: (1) Melt test — heat small quantity on aluminium foil; pure Coumarin melts cleanly at 69–71°C; impure material shows broadened or depressed melt. (2) Solubility test — 1g in 10ml 96% ethanol should give perfectly clear, colourless solution; turbidity or yellow coloration indicates impurities. (3) Odour test at 10% in DPG: clean sweet-hay-almond; any harsh, phenolic, or medicinal note = o-vinylphenol contamination; coconut character = dihydrocoumarin substitution. Always request GC certificate with batch number from any supplier.
FAQs

Frequently Asked Questions

How do I verify purity of Coumarin purchased in Pakistan? What adulterants should I watch for?+
The most reliable verification is a Gas Chromatography (GC-FID) certificate of analysis from the supplier showing >99.0% purity with a specific batch number — always request this before purchasing. For field verification without laboratory equipment, three practical tests are available. First, the melting point test: pure Coumarin melts sharply and cleanly at 69–71°C to a clear, colourless liquid; impure material shows a depressed or broadened melt range, or melts to a slightly yellowish or cloudy liquid. Second, the solubility test: dissolve 1g in 10ml 96% ethanol — pure Coumarin gives a perfectly clear, colourless solution; turbidity or any yellow coloration indicates impurities, most likely residual salicylaldehyde. Third, the odour test at 10% in DPG: genuine fragrance-grade Coumarin produces a clean, sweet, hay-almond aroma with warm powdery facets; a harsh, phenolic, or medicinal off-note indicates o-vinylphenol contamination (technical grade); a soft coconut character rather than hay indicates dihydrocoumarin substitution; an intensely sweet, direct vanilla note suggests Vanillin or Ethyl Vanillin has been added to mask low purity. Price is also a useful indicator: in the Pakistani market, pharmaceutical-grade Coumarin at competitive pricing is available from legitimate suppliers; material priced significantly below the market rate for >99% purity is almost always adulterated or technical grade. Bio Shop™ Pakistan supplies pharmaceutical-grade Coumarin with GC CoA available on request with each batch.
How should I store Coumarin in Pakistan’s hot and humid climate?+
Coumarin powder requires active protection from the three climate variables that pose the greatest risk in Pakistan: heat, light, and humidity. For Karachi’s extreme coastal humidity (75–90% RH year-round): Coumarin powder is mildly hygroscopic and will cake in humid conditions, eventually softening to a paste if both high humidity and elevated temperature combine. Store in sealed amber glass jars with silica desiccant packets; use the 10% DPG solution format if your Karachi storage environment cannot be reliably air-conditioned, as the solution is inherently resistant to moisture absorption; inspect containers periodically for caking or moisture on inner surfaces; seal immediately after each use. For Lahore’s extreme summer heat (38–45°C, May–August): Coumarin does not melt at typical Pakistani summer temperatures (melting point 69–71°C), but prolonged storage at 40°C+ accelerates powder caking if trace humidity is present; maintain air-conditioned storage below 30°C; never leave in vehicles during summer; use insulated cooler boxes for any transportation. For all Pakistani cities: use amber glass or opaque HDPE containers; keep away from direct sunlight and fluorescent lighting (UV causes yellowing); minimise headspace in partially used containers; consider nitrogen-blanketing for large volumes. Under appropriate storage conditions, 2–3 years shelf life from manufacture date is achievable for powder; 3–5 years for 10% DPG solution.
Is Coumarin halal? What is its exact synthesis origin?+
Yes. Synthetic Coumarin as sold by Bio Shop™ Pakistan is halal-suitable under the overwhelming consensus of Islamic scholarly opinion on synthetic aroma chemicals. The precise synthesis chain is as follows: (1) Salicylaldehyde (one starting material) is derived from phenol via the Reimer-Tiemann or Dakin-type oxidation pathway; phenol is sourced from benzene or cumene, both petroleum-derived — entirely mineral origin, no animal involvement. (2) Acetic anhydride (the second starting material) is derived from ketene chemistry, ultimately from natural gas or naphtha via acetic acid, again entirely petrochemical — no animal involvement. (3) The Perkin condensation reaction uses anhydrous sodium acetate as a base catalyst and is performed neat at 170–185°C; no alcohol solvent is used, and the acetic acid by-product is fully removed during post-reaction workup via steam distillation. (4) Purification is achieved via vacuum distillation and recrystallisation from ethanol or n-heptane, but the final product — the crystalline Coumarin powder — contains no residual ethanol (Karl Fischer specification: maximum 500 ppm water, no residual alcohol). (5) The final product, as supplied, is purely crystalline Coumarin: no alcohol, no animal-origin material, no haram processing at any stage. For formulators requiring formal halal certification for their finished products, a Halal Certificate from the Chinese manufacturer can be requested through Bio Shop™ Pakistan for professional accounts. The Coumarin 10% DPG solution is equally halal: DPG (dipropylene glycol) is a fully synthetic polyol, petroleum-derived, universally accepted as halal by Islamic standards bodies.
What is the correct usage percentage? When should I use pure powder versus 10% DPG?+
The decision is primarily one of measurement precision. Use pure Coumarin powder (>99% GC) when your target concentration in the compound or attar is 1% or above — at this level, 1g per 100g compound is easily and accurately weighed on a standard digital scale (0.01g precision). Using pure powder at 1%+ is also more economical per unit of active Coumarin. Use the 10% DPG solution when your target is below 1% in compound — at sub-1% levels, the quantity of pure powder to weigh is 0.1–0.9g per 100g compound, which is at or below the practical accuracy limit of most hobby-grade scales. The 10% solution allows you to weigh a quantity 10x larger for the same Coumarin dose, dramatically reducing measurement error. Critical formula adjustment: 1g of 10% DPG solution = 0.10g actual Coumarin. Example: if your formula calls for 0.3% Coumarin in a body lotion (100g), use 3.0g of 10% DPG solution. Practical use level guide: Attar (DPG base): 1–3% pure powder (dissolve in warm DPG first). EDP compound: 2–5% pure powder. Personal care finished product: 0.1–0.5% actual Coumarin (use 10% DPG solution). Candle or diffuser: 1–3% pure powder or solution. Always apply IFRA back-calculation before commercial release for any concentration used.
What is the difference between natural Tonka Bean oil and synthetic Coumarin for my formulations?+
Natural Tonka Bean Absolute (available at Bio Shop™ Pakistan) contains Coumarin as its dominant odorant (~3–5% w/w) alongside supporting notes of vanilla (Vanillin, Ethyl Vanillin), tobacco-balsamic facets, heliotropin (piperonal), and various other aromatic co-eluants that create a richer, more multidimensional profile than pure synthetic Coumarin. For formulations where maximum complexity and authentic naturalness are priorities — premium niche attar, naturals-focused Gulf-export positioning — Tonka Bean Oil provides a character that synthetic Coumarin alone cannot replicate. For formulations where batch consistency, cost efficiency, and precise IFRA control are priorities — commercial personal care, mass-market fragrances, production-scale attar — synthetic Coumarin is superior: it delivers the core coumarinic character with absolute consistency at a fraction of the cost, and its exact concentration in the formula is known precisely, simplifying IFRA back-calculation. In practice, the most effective strategy for high-value Pakistani oriental attars combines both: synthetic Coumarin at 2–3% provides the clean, consistent backbone and ensures IFRA compliance; Tonka Bean Oil at 0.5–1% adds the surrounding natural complexity, vanilla facets, and the “naturalness” that distinguishes premium compositions from functional ones. Both materials are IFRA-Restricted and require separate back-calculation to verify each meets its own category limits.
How does IFRA restriction affect my Pakistani formulation? Is it still safe to use Coumarin?+
Yes — Coumarin is absolutely safe and legal to use within IFRA limits, and its commercial and creative applications remain vast at compliant concentrations. The IFRA restriction does not prohibit Coumarin; it establishes maximum concentration ceilings in the finished consumer product based on dermal sensitisation risk assessment. For Pakistani domestic market formulation, IFRA compliance is the industry best practice rather than a legal obligation — there is no DRAP regulation specifically restricting Coumarin in cosmetics. However, IFRA compliance protects your consumers and your brand, and is essential if you target EU, UK, or Gulf export markets. The practical implication for a Pakistani EDP formulator is straightforward: at 3% Coumarin in a compound incorporated at 20% in the finished EDP, the Coumarin concentration in the finished product is 0.6% — within the indicative Category 4 limit of ~1.0% — fully compliant and commercially standard. For body lotion (leave-on), the limit is more conservative (~0.2–0.3%); use the 10% DPG dilution for accurate dosing at these lower levels. EU allergen labelling: if you export to EU or UK markets, COUMARIN must be declared on the ingredient label at typical use concentrations — this is an administrative labelling requirement, not a safety prohibition. Always consult the current IFRA 51st Amendment Standards document for the specific product category before commercial release.
Which Pakistani consumer segments respond best to Coumarin-forward fragrances?+
Four Pakistani consumer segments demonstrate the strongest and most consistent commercial response to Coumarin-forward compositions. First, adult males aged 30–55 in urban and semi-urban markets (Lahore, Rawalpindi, Multan, Karachi) who prefer classic, enduring oriental and fougère compositions — this is Coumarin’s natural home in Pakistan, and at 2–3% in a DPG attar, it delivers the warm, sweet, projecting masculine character this segment values for Eid, Friday prayer (Jumma), and wedding occasions. Second, the Eid and wedding gifting segment across all income levels, where warm-sweet-luxurious attars and EDPs in the PKR 500–2,500 range dominate; Coumarin’s association with the beloved fougère and oriental families makes it an innately “premium gift” olfactory signal. Third, Lahore and Punjab consumers generally, where the strong cultural preference for warm, sweet, and balsamic scent profiles is the most pronounced in Pakistan — Coumarin’s hay-almond character resonates deeply with the Lahori preference for “heavy, enduring” masculine compositions. Fourth, Gulf-export buyers who need Pakistani attar with a warm, sweet, oriental character that appeals to the Saudi, UAE, and Qatari market preference for rich tonka-vanilla-oriental warmth. Note: younger Pakistani consumers (18–25) in Karachi show greater preference for fresh, aquatic, and citrus-forward compositions; however, even in these demographics, a trace of Coumarin (0.5%) improves perceived warmth and quality without compromising the fresh top-note character.
What Urdu brand names work for Coumarin fragrances? How does it perform in Pakistan’s climate?+
Recommended Urdu naming vocabulary for Coumarin-featuring compositions draws on its hay-almond-sweetness olfactory identity: Meethi Ghaas (میٹھی گھاس — sweet grass), Badam Sukoon (بادام سکون — almond calm), Garm Gulab (گرم گلاب — warm rose, paired with rose materials), Hayati (حیاتی — vibrant, alive), Bahar Attar (بھار ‌عطر — spring fragrance), Tonka Sukoon (تونکا سکون — tonka calm). Example composition names: Meethi Ghaas Attar (classic fougère DPG attar); Hayati Cedar EDP (fougère spray); Badam Royale (almond-oriental for Eid gifting); Garm Gulab (warm-sweet rose oriental). Pakistan climate performance varies significantly by season. Winter (November–February): Coumarin’s warm, enveloping character is at its best — cooler Lahore winters (8–15°C) allow the full hay-almond heart to project clearly and the creamy powder dry-down to persist for 6–8 hours. Summer (May–September): at concentrations of 2–3% in compound, Coumarin-forward fragrances may project more aggressively than intended at 40°C+ ambient temperatures — the heat-amplified sillage can feel heavy. For summer formulations, reduce Coumarin to 1–1.5% in compound while increasing fresh citrus (D-Limonene, Bergamot EO) or aquatic (DHM, Linalool) top notes at 5–10% to produce a seasonally balanced composition. The Sabz Taaza formula (1.5% Coumarin in compound used at 15% in EDT = 0.225% in finished EDT) is ideal for year-round wearability in Pakistan’s diverse climate.
Complete Your Palette

Essential Companions

Aroma Chemical · Pre-diluted
Coumarin 10% in DPG
Same pharma-grade Coumarin in DPG solution. Ideal for sub-1% dosing in personal care and light EDT formulas
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Carrier · Diluent
Dipropylene Glycol (DPG)
Primary solvent for dissolving Coumarin powder (40°C) and attar carrier base · Odour-neutral · Halal ✓
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Alcohol Base
Perfume Premix
Sole alcohol base for EDP/EDT spray formulas · Bio Shop™ exclusive · Correct for all spray concentrations
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Essential Oil · Fougère Core
Lavender Essential Oil
The fougère trio: Lavender EO 5–10% + Coumarin 2–3% + Oakmoss = the classic accord since Fougère Royale 1882
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Aroma Chemical · Sweet
Vanillin
Oriental sweetness duo: Vanillin 2% + Coumarin 2% = the Shalimar-inspired accord engine. More complex than either alone
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Aroma Chemical · Woody
Iso E Super
Contemporary woody-sweet: Iso E Super 3–5% + Coumarin 1.5–2% = cedar-warm-sweet modern fougère
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Aroma Chemical · Fixative
Benzyl Benzoate
Oriental fixative duo: Benzyl Benzoate 5–10% + Coumarin 2–3% extends longevity in Pakistan heat. Bakhoor base essential
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Natural · NCS
Tonka Bean Oil
Natural tonka complexity over synthetic backbone: 0.5–1% Tonka + 2–3% Coumarin = full-spectrum hay-vanilla-tobacco accord
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Full Reference Document

Dive Deeper — Read the Complete Guide

Everything on this page and substantially more — complete Perkin Reaction synthesis mechanism with step-by-step diagrams, full structure–odour relationship analysis of the benzopyrone homologue series (Coumarin vs. Dihydrocoumarin vs. 6-Methylcoumarin), detailed RIFM safety assessment data with QRA2 methodology explained, the complete discovery and industrial production history from August Vogel in 1820 to today’s Chinese manufacturers, Fougère Royale’s revolutionary place in perfumery history, full natural occurrence data across 100+ plant species, IFRA 51st Amendment category-by-category limit table with back-calculation worked examples for Pakistan formats, advanced Pakistani market segmentation analysis with three complete product concepts (Meethi Ghaas attar, Hayati Cedar EDP, Sabz Taaza body lotion), full stability and compatibility testing protocol, and a comprehensive glossary of 20 key aroma chemical terms — all compiled in one complete professional reference document.

View Full Document
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