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Fragrance

DIACETYL

CAS 431-03-8
42

Safety score · 0–100

Moderate

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

2,3-Butanedione — buttery flavor/fragrance compound. Notorious for inhalation toxicity (popcorn lung) in occupational settings; cosmetic aerosol use is the safety concern.

Function

PERFUMING

Skin benefits

  • Buttery-creamy flavor and fragrance note
  • FEMA listed for food flavor

Known concerns

  • Inhalation hazard — bronchiolitis obliterans (popcorn lung) in occupational exposure
  • NIOSH respiratory occupational concern
  • Skin/eye GHS irritant
  • Limit aerosolized cosmetic use

References

EU

EU CosIng database

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

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