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1,2,3,4,4A,5,6,7-OCTAHYDRO-2,5,5-TRIMETHYL-2-NAPHTHOL.

Optional CAS 41199-19-3 / PERFUMING

This compound, also known as Ambrinol, is a lipophilic fragrance component naturally found in ambergris. It imparts a distinctive amber, musky, animalic, and earthy aroma to various cosmetic and personal care products.

Fragrance Ingredient

Science

Its primary function is olfactory, acting as a perfuming agent. It delivers a complex aromatic profile characterized by amber, musky, animalic, and earthy notes, thereby enhancing the sensory experience of a product without directly impacting skin physiological processes.


Research

Insufficient-data confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

This ingredient exhibits lipophilic properties, with reported logP values ranging from 2.8 to 4.6 at 25°C, indicating its oil-soluble nature. While sparingly soluble in water (e.g., 134.3 mg/L at 25°C estimated), it demonstrates good solubility in alcohol. Specific optimal pH range for stability is not available.


Safety

CIR Status
Not reviewed
Max tested
1%
Sensitization risk Low

The Research Institute for Fragrance Materials (RIFM) has conducted a peer-reviewed safety assessment, concluding that this ingredient is safe for use in everyday products at current exposure levels (0.21 μg/kg/day), which is below the TTC of 9 μg/kg bw/day for Cramer Class II materials. RIFM studies determined it to be non-genotoxic and non-sensitizing in three human repeat insult patch tests (HRIPTs), with its chemical structure suggesting no reactivity with skin proteins. The Dermal Sensitization Threshold (DST) of 900 μg/cm2 further supports a low risk for skin sensitization. However, its safety has not been reviewed by the CIR. Aggregated GHS information from the ECHA C&L Inventory indicates that 32.9% of reports classify it as H315 ('Causes skin irritation'), while 67.1% report no GHS hazard criteria met. Environment Canada categorizes it as not expected to be toxic, harmful, persistent, or bioaccumulative in the environment. Typical concentrations in finished cosmetic products like skin creams, shampoos, and hair/deodorant sprays range from 0.2-1%, and in deodorant sticks from 1-3%.


Your Skin

No Normal
No Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Optional

Primarily serving as a fragrance component to impart an amber, musky aroma, this ingredient is considered optional in precision skincare formulations due to a lack of direct therapeutic skin benefits, despite a generally favorable safety profile at recommended cosmetic concentrations.


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