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BUTYLOCTANOL.

Valuable CAS 3913-02-8 / HUMECTANT, SOLVENT

A lightweight branched fatty alcohol that serves as a multi-functional emollient, solvent, and texture enhancer in skincare formulations. Beyond its traditional cosmetic functions, emerging research reveals its unique ability to selectively modulate skin microbiome by inhibiting odor-causing bacteria while preserving beneficial flora. This Guerbet alcohol delivers skin-softening benefits without heavy residue, making it suitable across all skin types.

emollient solvent texture enhancer microbiome modulator

Science

Acts as a selective microbiome prebiotic by inhibiting anaerobic Corynebacterium species while promoting beneficial Staphylococcus epidermidis growth. Simultaneously functions as an emollient that softens skin through its branched fatty alcohol structure and serves as a solvent that reduces formula viscosity while enhancing product spreadability without greasy after-feel.


Research

Medium confidence
Effective range 0.05–3%
Optimal

1%

Key findings

  1. 01 Demonstrated selective prebiotic effect in human axillary microbiome study, significantly reducing odor-causing Corynebacterium while promoting beneficial Staphylococcus
  2. 02 Confirmed selective antimicrobial activity against corynebacteria while maintaining Staphylococcus epidermidis growth

Transparency

Not commonly dusted

Primarily used as functional ingredient for texture and microbiome benefits rather than marketing claims


The Formula

Solubility
Oil
Optimal pH 3 – 7
0 7 14

Stability

Stable under standard cosmetic conditions but susceptible to oxidation by strong oxidizing agents, potentially forming aldehydes or carboxylic acids

Conflicts

  • Strong oxidizing agents

Safety

CIR Status
Safe as used
Max tested
1%
Pregnancy
Safe
Sensitization risk Low

CIR reviewed within alkyl esters and branched fatty alcohols group. Higher concentrations up to 3% used in specialized deodorant applications.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

A well-tolerated multifunctional ingredient that combines traditional emollient benefits with emerging microbiome modulation properties.


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