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BUTYL ISOHEXANOATE.

Optional CAS 6297-41-2 / PERFUMING

A synthetic ester that serves dual purposes in skincare formulations as both a fragrance component and lightweight emollient. While primarily used to mask unpleasant odors from active ingredients, it also provides mild conditioning benefits by forming a non-greasy protective film on skin. Its moderate irritation potential makes it unsuitable for sensitive skin types despite its low comedogenic profile.

fragrance masking emollient

Science

Creates a thin, breathable layer on the skin surface that helps reduce transepidermal water loss while delivering fragrance benefits. As an aliphatic ester, it integrates into the skin's lipid barrier to enhance texture and sensory feel without heavy residue.


Research

Low confidence
Effective range ≤1%
Optimal

N/A


Transparency

Not commonly dusted

Functions primarily as a functional ingredient rather than an active, making dusting practices irrelevant for this component.


The Formula

Solubility
Oil
Optimal pH 4 – 8
0 7 14

Stability

Prone to hydrolytic breakdown when exposed to extreme pH conditions, splitting into constituent alcohol and acid components

Conflicts

  • Strong oxidizing agents
  • Strong acids
  • Strong bases

Safety

CIR Status
Safe as used
Max tested
1%
Sensitization risk High

ECHA classifies as Category 2 skin irritant and Category 1B skin sensitizer, with IFRA restrictions applying to fragrance applications


Your Skin

Yes Normal
Yes Dry
Yes Oily
No Sensitive
Irritancy Moderate
Comedogenicity Low

Our Assessment

Optional

A functional ingredient with limited skincare benefits that may pose sensitization risks for minimal gain.


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