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FUSEL OIL.

Questionable CAS 8013-75-0 / PERFUMING

Fusel oil is a complex mixture of higher alcohols, including isoamyl, isobutyl, and propyl alcohols, naturally derived as a byproduct of alcoholic fermentation. While some components exhibit antimicrobial properties, its primary application in skincare is as a fragrance agent or solvent.

Fragrance Ingredient Solvent Antimicrobial Agent

Science

Fusel oil primarily functions as a fragrance enhancer and solvent within formulations. Specific components within the mixture have demonstrated antimicrobial activity, though its direct beneficial mechanism for skin health is not its primary role.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Water
Optimal pH N/A
0 7 14

Stability

This ingredient is a flammable liquid and vapor. It can generate flammable and/or toxic gases when combined with alkali metals, nitrides, and strong reducing agents. It also participates in esterification reactions with oxoacids and carboxylic acids, and can be oxidized to aldehydes or ketones. The raw material typically exhibits a pH between 4.0 and 5.0.

Conflicts

  • alkali metals
  • nitrides
  • strong reducing agents
  • oxoacids
  • carboxylic acids
  • oxidizing agents

Safety

CIR Status
Safe with restrictions
Max tested
0.8%
Sensitization risk Moderate

ECHA REACH registrations indicate potential hazards including carcinogenicity, flammability, serious eye damage, aquatic toxicity, skin irritation, respiratory irritation, drowsiness, dizziness, and allergic skin reaction. Despite these concerns, its absorption through the skin is considered limited. The FDA no longer supports its use as a synthetic flavoring substance.


Your Skin

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

Our Assessment

Questionable

Fusel oil serves primarily as a fragrance and solvent; however, its notable safety concerns, including potential for skin irritation and allergic reactions, warrant careful consideration for precision skincare formulations.


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References