✦ White crystalline powder with a sweet, warm, hay-like tonka bean scent used as a fixative and blender in fine perfumery
✦ Foundational note in classic fougère, oriental, and gourmand fragrance families — appears in Guerlain Jicky, Dior Fahrenheit, and Azzaro Pour Homme
✦ Excellent fixative that anchors top notes and slows down evaporation of lighter materials in a blend
✦ Very low odor threshold — effective at concentrations as low as 0.2 ppm, making it highly economical
✦ Soluble in alcohol and fragrance oils — easy to incorporate into perfume concentrates, soaps, and lotions
✦ Suitable for cosmetic applications including body lotions, hair products, and rinse-off formulations at IFRA-compliant rates
✦ Vegan and cruelty-free synthetic aroma chemical — no animal-derived materials

Coumarin is one of the most historically significant aroma chemicals in perfumery. First isolated from tonka beans in 1820 and synthesized in the laboratory by William Henry Perkin in 1868, it became one of the first synthetic fragrance materials ever used commercially. Its introduction transformed perfumery by making a warm, powdery, hay-like scent character available at scale. Coumarin was a cornerstone of Houbigant Fougère Royale in 1882, the fragrance that defined an entire perfume family — the fougère — which remains one of the most important categories in modern masculine perfumery.

What makes coumarin exceptional is its dual role as both a character note and a fixative. It does not simply add sweetness — it harmonizes a blend, softens sharp angles in woody or herbal compositions, and creates a creamy, enveloping quality that is difficult to replicate with other materials. Its molecular structure interacts well with musks, woods, and florals, making it a natural bridge between contrasting notes. Perfumers often describe it as the "velvet lining" of a fragrance — not always obvious, but deeply felt when absent.

Bio Shop Pakistan supplies cosmetic-grade coumarin powder suitable for DIY perfumers, attar formulators, soap makers, and beauty product developers who require a reliable, consistent aromatic fixative for their creations.

SCENT DESCRIPTION : Coumarin opens with a clean, dry sweetness reminiscent of freshly cut hay and sun-dried grass. As it settles, a warm tonka-like creaminess emerges with soft vanilla undertones and a faint almond nuance. The drydown is smooth, powdery, and gently balsamic — comforting rather than heavy. It leaves a soft, lingering warmth that smooths and rounds any composition it inhabits.

NOTE POSITION : Base-Mid

FRAGRANCE FAMILY : Fougère · Oriental · Gourmand

FACETS : Hay · Tonka · Sweet · Powdery · Balsamic

TENACITY : High — 6 to 10 hours on skin, 12 to 20 hours on fabric

SILLAGE : Medium — projects softly at low concentrations, building moderate sillage above 2% in a blend

Chemical Name : 2H-Chromen-2-one (1-Benzopyran-2-one)
CAS Number : 91-64-5
Synonyms : 2H-1-Benzopyran-2-one · Coumarinic Anhydride · Tonka Bean Camphor · o-Hydroxycinnamic Acid Lactone
Purity : 99% min
Appearance : White to off-white crystalline powder
Odor Threshold : 0.2 ppm (air)
Solubility : Slightly soluble in water (1.7 g/L at 20°C) · Freely soluble in ethanol, diethyl ether, and fragrance oils
Specific Gravity : 1.17 g/cm³ at 25°C
Flash Point : 150°C (302°F)
Melting Point : 68 to 70°C
Type : Semi-synthetic (synthetically produced, naturally occurring compound)

Fine Fragrance ★★★★★
Coumarin is a pillar ingredient in fine perfumery. It is indispensable in fougère, oriental, and gourmand constructions. Use it to add warmth and softness to floral hearts or to anchor woody and herbal top notes. It performs beautifully in both masculine and feminine accords.

Attar & Oriental Blending ★★★★★
Coumarin is highly valued in attar and Arabic oudh blending. It smooths the animalic edges of oud, adds creamy sweetness to amber bases, and harmonizes spicy notes like cinnamon and cardamom. It is a preferred fixative in traditional Eastern-style concentrations.

Functional Fragrance ★★★★☆
Works well in soaps, body washes, and fabric softeners where a warm, clean-sweet background is desired. Stability in rinse-off products is good. Keep usage within IFRA limits for leave-on categories to avoid sensitization risk.

Cosmetics ★★★☆☆
Useful in body lotions and hair products for its soft scent contribution. It is an EU-listed fragrance allergen so labeling is required above 0.001% in leave-on products. Use with care and stay within permitted limits.

Home Fragrance ★★★★★
Excellent in candles, reed diffusers, and incense. Coumarin adds a deep, sweet warmth that pairs beautifully with vanilla, woods, and musks in home fragrance applications. No IFRA restrictions apply to non-skin categories.

Recommended Usage Rates in Finished Product

EDP (Eau de Parfum) : 0.5% to 2.0%
EDT (Eau de Toilette) : 0.3% to 1.5%
Body Lotion / Cream : 0.1% to 0.4%
Shampoo / Body Wash : 0.2% to 1.0%
Candle : 1.0% to 5.0%
Reed Diffuser : 1.0% to 6.0%
Soap (cold process) : 0.5% to 1.5%

IFRA 51st Amendment Limits (in finished product)

Category 4 — Fine Fragrance (EDP/EDT/Cologne) : 0.9% max
Category 5A — Body Lotion, Cream (leave-on) : 0.4% max
Category 5B — Face Cream (leave-on) : 0.4% max
Category 7A — Rinse-off hair products : 2.5% max
Category 8 — Antiperspirant / Deodorant : 0.4% max
Category 9 — Soap / Body Wash (rinse-off) : 2.5% max
Category 10A — Candles and home fragrance : No restriction
Category 11A — Reed diffusers and air fresheners : No restriction

⚠️ Coumarin is listed as a potential skin sensitizer. Always perform a patch test when formulating leave-on products.
⚠️ Coumarin is an EU Cosmetics Regulation listed allergen. Declaration on label is required above 0.001% in leave-on and 0.01% in rinse-off products.
⚠️ Coumarin has shown hepatotoxic effects in animal studies at high oral doses. It is not for ingestion. Keep away from children.

Method 1 — Pre-dissolve in Alcohol
Dissolve coumarin powder in 96% perfumer's alcohol before adding to your blend. Use a ratio of 1g coumarin per 10ml alcohol and warm gently to 30 to 40°C to speed dissolution. This ensures even distribution throughout your formula and prevents crystallization in the finished product.

Method 2 — Blend into a Carrier Oil Base
For oil-based attars and perfume oils, melt coumarin into a small amount of IPM or fractionated coconut oil first, then incorporate into your blend. Use 1 to 3% of total formula weight. This method is ideal for traditional attar concentrates and hair oils.

Method 3 — Direct Powder Addition to Candles
For soy or paraffin candles, add coumarin powder directly to melted wax at 70 to 75°C and stir thoroughly until fully dissolved. Combine with vanilla, sandalwood, or amber fragrance oils for a rich warm gourmand throw.

BEST PAIRINGS

Lavender → Creates the classic fougère accord — clean, aromatic, masculine
Tonka Bean Absolute → Amplifies the creamy sweetness and adds depth
Oakmoss / Iso E Super → Builds a refined woody-green fougère structure
Vanilla / Ethyl Vanillin → Intensifies the gourmand warmth for oriental and dessert accords
Sandalwood / Mysore → Adds a smooth creamy wood dimension to oriental blends
Vetiver → Grounds coumarin and adds earthy complexity for masculine bases
Ambrette Seed / Ambroxan → Lifts coumarin into a modern musky-sweet finish
Bergamot → Brightens the sweetness and adds a fresh citrus top note entry

AVOID
Do not combine coumarin at high rates with strong green or ozonic materials — it tends to clash and create muddy, undefined accords. Avoid using above IFRA limits in leave-on products regardless of desired intensity.

Every serious fragrance wardrobe needs coumarin. When I first work with it, I remind myself that coumarin is not a supporting actor — it is the director. It does not announce itself loudly, but it controls the mood of an entire blend. The classic fougère was built on just three pillars: lavender, oakmoss, and coumarin — and that triangulation has influenced hundreds of fragrances over 140 years. In oriental and attar work, I use it to bridge the gap between resinous base materials and brighter top notes, softening transitions and creating seamless blends. It is one of those rare materials that makes everything around it smell better.

ADVANCED TIP : Dissolve coumarin at 3% into a small base of diethyl phthalate or IPM and use that pre-blend as a fixative carrier for your entire oriental formula. This "coumarin base" slows down the evaporation of lighter materials in your blend by 15 to 25%, extending longevity without needing to add heavier musks or resins. Add a small amount of ethyl vanillin (1:10 ratio coumarin to ethyl vanillin) to the same base for a tonka bean effect that rivals natural absolute.

Physical State : White crystalline powder at room temperature, melts at 68 to 70°C
Skin Safety : Potential sensitizer — use within IFRA limits. Avoid direct skin contact with undiluted powder. Wear gloves during handling.
Eye Contact : Avoid contact. In case of contact, rinse with clean water for 15 minutes and seek medical advice if irritation persists.
Ingestion : Not for consumption. Coumarin is toxic in large oral doses. In case of accidental ingestion, contact a poison control center immediately.
Ventilation : Use in a well-ventilated space. Coumarin dust can cause mild respiratory irritation in poorly ventilated areas.
Storage : Store in a sealed airtight container away from heat, direct sunlight, and humidity. Keep at cool room temperature.
Shelf Life : 3 to 5 years when stored correctly in a sealed container away from heat and moisture
Container : Dark glass jar or food-grade HDPE container with airtight lid — do not store in soft plastics long-term
Flammability : Flash point 150°C — not considered flammable under normal storage and use conditions

Q: How do I dissolve coumarin powder in my perfume blend?
A: Dissolve it in warm perfumer's alcohol first. Heat your alcohol to 35 to 40°C and stir the powder in slowly. It dissolves easily and fully once warm.

Q: Is coumarin safe to use in leave-on products like body lotion?
A: Yes, within IFRA 51st Amendment limits. For body lotion and face cream, the maximum permitted level is 0.4% in the finished product. Do not exceed this in leave-on applications.

Q: What is the EU allergen labeling rule for coumarin?
A: Coumarin must be declared on cosmetic product labels if it is present above 0.001% in leave-on products and above 0.01% in rinse-off products under EU Cosmetics Regulation.

Q: Can I use coumarin in candles and reed diffusers without restrictions?
A: Yes. IFRA does not apply restrictions to non-skin products like candles, diffusers, and incense. Use at 1 to 6% depending on the application for best results.

Q: How does synthetic coumarin compare to natural coumarin from tonka bean?
A: Synthetic coumarin is chemically identical to the coumarin found in tonka bean and is more consistent in purity, odor strength, and availability. Natural tonka bean absolute contains coumarin alongside many other aromatic compounds which give it additional complexity and depth. For isolated, clean, predictable coumarin character, the synthetic powder is preferred. For full tonka bean richness, combine synthetic coumarin with tonka or benzyl benzoate accents