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Antioxidant

TBHQ

CAS 1948-33-0
42

Safety score · 0–100

Moderate

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

Tert-butylhydroquinone — a synthetic antioxidant used to keep oils from going rancid. Effective at low %, but flagged for skin irritation and oral genotoxicity questions.

Function

ANTIOXIDANTFRAGRANCEPERFUMING

Skin benefits

  • Effective antioxidant — preserves oils
  • Stabilizes formulas against rancidity
  • Used at very low %

Known concerns

  • Concerns over genotoxicity at high oral dose
  • Skin irritation/sensitization possible
  • Limited cosmetic-specific safety data

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.