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DIHYDRO PENTAMETHYLINDANONE.

Questionable CAS 33704-61-9 / FRAGRANCE, PERFUMING

Dihydro Pentamethylindanone is a synthetic fragrance compound that imparts a warm, woody, musky, and amber scent. Its primary function is to enhance the aroma of cosmetic products or perfume the skin.

Perfuming

Science

This ingredient functions solely as an olfactory agent, providing a distinct scent profile. There is no known biological function or mechanism of action relevant to direct skincare benefits.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Maintains olfactory profile across typical personal care pH ranges and is compatible with alcohol- and oil-based systems. Formulators should consider preventing oxidation and thermal decomposition due to its very low water solubility (49.1 mg/L at 20°C).


Safety

CIR Status
Safe as used
Max tested
3.8%
Sensitization risk Moderate

Classified as a slight skin and eye irritant, with potential for allergic skin reactions (GHS H315, H317). IFRA standards restrict its use, allowing up to 3.8% in fine fragrances but lower limits for other product types, such as 0.31% for body lotions.


Your Skin

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

Our Assessment

Questionable

As a fragrance ingredient with no active skincare benefits and a moderate risk of irritation and sensitization, its inclusion in precision skincare formulations is questionable.


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