Skip to content

ISONONYL ACETATE

CAS 40379-24-6
68

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

A branched-chain ester producing a fruity, citrus-like fragrance; widely used in cosmetics and considered safe at normal use concentrations with no EU restrictions.

Isononyl acetate refers to esters of branched nonanol isomers with acetic acid, resulting in a fruity-citrus olfactory profile. CosIng evaluation shows no entry in EU Annexes II–VI, indicating no specific regulatory restrictions. The substance has a favorable toxicological profile at current use levels, though in isolated cases it has shown mild irritation potential in predictive sensitization assays.

Skin benefits

  • Fruity citrus fragrance
  • Solvent for cosmetic fragrance compositions

Known concerns

  • Mild skin irritation possible in sensitive individuals

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

Check your shelf

Find ISONONYL ACETATE in your products.

Scan any cosmetic product with LuxSense to see if it contains ISONONYL ACETATE and get a full ingredient breakdown with safety scores.

This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.