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3-ETHYL-2-METHYLNON-2-ENOIC ACID.

Insufficient Data CAS 71850-80-1 / PERFUMING

A specialized branched fatty acid primarily recognized for its perfuming properties in cosmetic formulations. While structurally capable of providing light emollient benefits and lipid barrier support, its role in skincare remains predominantly as a fragrance component rather than an active ingredient.

Perfuming Light emollient

Science

Functions primarily as a perfuming agent to provide specific olfactory notes and mask base product odors. Its branched unsaturated fatty acid structure may offer minor skin conditioning benefits through light emollient action and potential lipid barrier reinforcement, though these effects are secondary to its fragrance function.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

As a fragrance component rather than an active ingredient, dusting is not a relevant concern for this compound


The Formula

Solubility
Oil
Optimal pH 4.5 – 7
0 7 14

Stability

Susceptible to oxidation due to its unsaturated fatty acid structure, requiring antioxidant protection such as Tocopherol. Maintains stability in both oil-in-water and water-in-oil emulsion systems within skin-neutral pH ranges.

Synergies

  • Tocopherol (Vitamin E)
  • Other antioxidants

Conflicts

  • Strong oxidizing agents
  • Strong alkaline compounds

Safety

CIR Status
Not reviewed
Sensitization risk Unknown

Approved for use in EU Cosmetic Ingredient Database and Japanese Quasi-Drug ingredient lists. Must comply with IFRA fragrance safety standards when used as a perfuming component.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Insufficient Data

A specialized fragrance ingredient with limited clinical evidence for significant skincare benefits beyond olfactory enhancement.


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