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Fragrance

4-METHYLPENTANE-2,3-DIONE

CAS 7493-58-5
45

Safety score · 0–100

Moderate

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

An alpha-diketone with buttery aroma, related to diacetyl. Used at trace fragrance levels; diketones carry inhalation safety concerns and are generally avoided in leave-on cosmetics.

Function

PERFUMING

Skin benefits

  • Trace fragrance impact

Known concerns

  • Diketone inhalation toxicity (class-analogy with diacetyl)
  • Skin/eye irritation

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.