✦ Polycyclic synthetic musk delivering a clean, warm, and powdery skin-musk effect
✦ Excellent fixative — extends the longevity of floral, fresh, and woody accords significantly
✦ Stable across a wide pH range, making it suitable for rinse-off and leave-on cosmetic formulations
✦ Used in globally recognized fine fragrances, fabric softeners, shampoos, and body lotions
✦ Soluble in alcohol and fragrance oils — easy to incorporate into most formulation bases
✦ Vegan and cruelty-free synthetic alternative to animal-derived musks like civet and castoreum
✦ Low usage rate required — effective at concentrations as low as 0.5%, making it highly cost-efficient

Tonalide, also known by its chemical abbreviation AHTN, is a polycyclic musk aroma chemical first developed in the mid-twentieth century as part of the synthetic musk revolution in the fragrance industry. It was designed to replace environmentally problematic nitro musks, offering a cleaner, safer, and more sustainable musk profile. Over the decades, Tonalide became one of the most commercially important musk materials in perfumery and personal care manufacturing worldwide.

What sets Tonalide apart from other synthetic musks is its uniquely smooth, skin-like warmth combined with a softly powdery and slightly floral character. Unlike some musks that can smell sharp or clinical, Tonalide reads as intimate and natural on skin. It has exceptional tenacity without being overpowering, which is why it is trusted as a base note and fixative in countless commercial fragrances. Its molecular stability also means it performs reliably in both leave-on and rinse-off products without degradation.

Bio Shop Pakistan supplies cosmetic-grade Tonalide suitable for independent perfumers, soap makers, lotion formulators, and home fragrance creators seeking a professional-quality musk base for their DIY projects.

SCENT DESCRIPTION : Tonalide opens with a clean, airy softness that quickly settles into a warm, powdery musk. There is a subtle sweetness reminiscent of skin warmed by sunlight, with a faint floral undertone that keeps it from reading as purely synthetic. On drydown it becomes deeply smooth, intimate, and quietly sensual — the kind of musk that makes a fragrance feel like a second skin. It is neither loud nor sharp, but leaves a memorable trail that lingers gently for hours.

NOTE POSITION : Base

FRAGRANCE FAMILY : Musky · Powdery · Clean Fresh

FACETS : Clean · Warm · Powdery · Soft · Skin-like

TENACITY : Very High — 12 to 24 hours on skin, 24 to 48 hours on fabric

SILLAGE : Medium — projects softly in the immediate aura, ideal for intimate wear and leave-on products

Chemical Name : 7-Acetyl-1,1,3,4,4,6-hexamethyl-1,2,3,4-tetrahydronaphthalene
CAS Number : 21145-77-7
Synonyms : AHTN, Musk AHTN, Tonalide AHTN, 6-Acetyl-1,1,2,3,3,5-hexamethylindane (not correct — AHTN only)
Purity : 97% minimum (verify with supplier for lot-specific CoA)
Appearance : Colorless to pale yellow clear liquid
Odor Threshold : Approximately 0.0003 mg per cubic meter (extremely low — highly detectable)
Solubility : Insoluble in water — soluble in ethanol, IPM, fragrance oils, and carrier oils
Specific Gravity : 1.00 to 1.02 at 20°C
Flash Point : Approximately 110°C (closed cup)
Type : Synthetic polycyclic musk

Fine Fragrance : ★★★★★
Tonalide is a cornerstone ingredient in fine fragrance formulation, used as a base note anchor and fixative. It extends the life of floral, fresh, and woody accords and adds a skin-musk warmth that makes fragrances feel personal and intimate. Ideal for EDP, EDT, and perfume oil compositions.

Attar and Oriental Blending : ★★★★☆
In oriental and attar-style compositions, Tonalide rounds out heavy oud, resinous, and spiced accords by adding a clean musk lift that prevents the blend from becoming too dense. It works well in mukhallat bases and attar-inspired alcohol-free oil blends at 2 to 5 percent.

Functional Fragrance : ★★★★★
Tonalide is one of the most widely used musks in functional fragrance applications including fabric softeners, detergents, shampoos, and body washes. Its excellent rinse-off retention and stability in surfactant systems make it a top choice for adding lasting freshness to everyday personal care products.

Cosmetics : ★★★★☆
In leave-on cosmetics such as body lotions, creams, and hair conditioners, Tonalide imparts a subtle skin-musk trail that enhances the sensory experience. It remains stable in emulsion systems and at typical cosmetic pH ranges of 4 to 7, making it easy to formulate.

Home Fragrance : ★★★★☆
Tonalide performs well in reed diffusers and room sprays, contributing a clean and warm musk background that blends naturally with florals, woods, and citrus accords. In candles it can be used at low levels but performance varies by wax type — soy wax tends to deliver better musk throw than paraffin.

Recommended Usage Rates

EDP (Eau de Parfum) : 5% to 15%
EDT (Eau de Toilette) : 3% to 8%
Body Lotion / Cream : 0.5% to 2%
Shampoo / Body Wash : 0.2% to 1%
Candle : 2% to 5% (wax type dependent)
Reed Diffuser : 5% to 15%
Bar Soap / Tablet Soap : 0.5% to 1.5%

IFRA 51st Amendment Limits (AHTN — Tonalide)

IFRA Category 1 (Toys, lip products with significant ingestion risk) : 0.02%
IFRA Category 3 (Lip products, mouthwash) : 0.02%
IFRA Category 4 (Fine fragrance — hydroalcoholic) : No restriction listed
IFRA Category 5 (Body lotion, deodorant, face cream) : No restriction listed
IFRA Category 9 (Rinse-off products like shampoo, body wash) : No restriction listed
IFRA Category 11 (Fabric softener, laundry) : No restriction listed

⚠️ Note: Tonalide (AHTN) is subject to environmental scrutiny in some regions due to aquatic persistence. Always verify current IFRA limits against the official IFRA website or the ingredient supplier's Safety Data Sheet before production. Usage in lip products must be kept at or below 0.02%.
⚠️ Avoid use in products intended for direct application near eyes or mucous membranes at concentrations above 1%.

Method 1 — Direct Dilution in Alcohol
Dissolve Tonalide directly in perfumers alcohol (ethanol 95% or IPA) at your desired usage rate. It dissolves readily at room temperature with gentle stirring. Add it as one of the first base-note materials before layering your heart and top notes. This ensures even distribution and maximum fixative effect throughout the composition.

Method 2 — Pre-blend in Carrier Oil for Attars and Roll-ons
For oil-based perfumes and attars, pre-dilute Tonalide in a neutral carrier such as isopropyl myristate (IPM) or fractionated coconut oil at 10% to 20% before adding to your blend. This makes handling easier and ensures clean incorporation without streaking or separation in finished oil blends.

Method 3 — Functional Formulation Boost
In shampoos, body washes, and fabric softeners, add Tonalide pre-dispersed in a small amount of solubilizer (such as PEG-40 hydrogenated castor oil) before blending into your aqueous base. This prevents cloudiness and ensures uniform musk distribution in surfactant systems.

BEST PAIRINGS

Iso E Super → Amplifies the woody, skin-musk depth and adds a velvet-cedar dimension
Galaxolide (HHCB) → Pairs perfectly for a full-spectrum clean musk accord — powdery and diffusive together
Hedione → Adds jasmine-like radiance on top of Tonalide's soft musk base
Ambroxan → Creates a powerful skin-musk amber combination with exceptional tenacity
Linalool → Softens Tonalide's warmth and adds a fresh, clean floral lift
Sandalwood EO → Deepens Tonalide into a creamy, soft woody musk
Bergamot EO → Provides bright citrus contrast against the warm musk base

AVOID
Avoid combining Tonalide at high concentrations with strongly alkaline soap bases above pH 9 as it may affect stability. In high-temperature candle processes above 85°C, keep exposure time minimal and add Tonalide to cooled wax to preserve integrity.

Tonalide is one of those rare materials that sits quietly in the background of a fragrance and yet is responsible for everything the wearer loves about the dry-down. I think of it as the skin of the formula — it is not the thing you smell first, but it is the reason the fragrance feels like it belongs to you personally. What I appreciate most about Tonalide in practice is how democratically it behaves: it supports jasmine without competing, it anchors citrus without dulling it, and it gives fresh aquatics a reason to last beyond the first hour. When I smell a fragrance that dries down beautifully but I cannot identify why, Tonalide is usually involved.

ADVANCED TIP : For an effortlessly modern clean-musk accord, blend Tonalide at 6% with Galaxolide (HHCB) at 4% and add a trace of Cashmeran at 0.5% in your base. This three-musk foundation creates a multi-dimensional skin scent that reads as simultaneously clean, warm, and softly cashmere-like. Layer your heart notes above this base and the result will have the kind of smooth, professional dry-down associated with premium designer fragrances. Adjust the Tonalide-to-Galaxolide ratio to shift between powdery warmth (more Tonalide) and clean diffusion (more Galaxolide).

Physical State : White to off-white waxy solid or powder at room temperature
Skin Safety : Generally considered safe at recommended usage rates — may cause sensitization in rare cases at high concentrations — perform patch test
Eye Contact : Avoid direct contact — flush thoroughly with water for 15 minutes if contact occurs and seek medical advice
Ingestion : Not for internal use — if ingested accidentally seek immediate medical attention
Ventilation : Use in a well-ventilated workspace — avoid prolonged inhalation of concentrated vapor
Storage : Store in a cool, dark location away from heat and direct sunlight — ideal storage temperature 10°C to 25°C
Shelf Life : 3 to 5 years when stored correctly in a sealed container
Container : Store in original dark glass or HDPE container with lid tightly closed — avoid contact with copper or brass fittings
Flammability : Combustible — keep away from open flames and sparks — flash point approximately 110°C

Q: What is Tonalide used for in perfumery?
A: Tonalide is used as a base note fixative and clean musk material in fine fragrances, personal care products, and home fragrance. It gives compositions a warm, skin-like musk dry-down and helps other notes last longer.

Q: At what percentage should I add Tonalide to my perfume?
A: For an EDP, 5% to 10% is a typical starting point. For body lotion or shampoo, 0.5% to 1% is sufficient. Start low, test on a mouillette strip, and increase gradually to avoid over-musking the blend.

Q: Is Tonalide safe for skin use?
A: Yes, at recommended usage rates Tonalide is considered safe for leave-on skin products. Keep concentrations within IFRA and industry guidelines and avoid use near eyes or in lip products above 0.02%.

Q: Can Tonalide be used in cold process or hot process soap?
A: Yes, Tonalide can be used in soap at 0.5% to 1.5%. It shows reasonable stability in alkaline soap matrices though some musk intensity may reduce during saponification. Pre-blending it with your fragrance oil before adding to soap batter helps retain performance.

Q: How does Tonalide compare to Galaxolide (HHCB)?
A: Both are leading polycyclic musks but with distinct characters. Tonalide (AHTN) reads warmer, slightly powdery, and more skin-like. Galaxolide (HHCB) is cleaner, fresher, and more diffusive. Many professional formulators use both together at a 60:40 or 50:50 ratio to create a full-spectrum synthetic musk base that is both diffusive and tenacious.