P-HYDROXYANISOLE
Other
Caution
CAS Number: 150-76-5
About P-HYDROXYANISOLE
A phenolic antioxidant (MEHQ) used as a polymerization inhibitor and skin conditioning agent; restricted under EU Annex III (III/95) due to endocrine-disrupting concerns and sensitization.
Detailed Analysis
4-Hydroxyanisole (MEHQ) serves dual functions in cosmetics as a polymerization inhibitor for monomers and as a skin conditioning agent with antioxidant properties. However, the compound has demonstrated endocrine-disrupting activity in toxicological studies, raising concerns about its safety in leave-on cosmetic products. EU Regulation 1223/2009 Annex III listing (reference III/95) restricts its use to specified concentration limits and prohibits use in certain product types. The phenol structure contributes to skin irritation potential, and the SCCS has noted that the risk-benefit ratio for cosmetic use requires careful evaluation given the availability of safer alternatives.
Skin Benefits
- ✓ Antioxidant skin conditioning properties
- ✓ Polymerization inhibition in cosmetic formulations
Known Concerns
- ⚠ EU Annex III restriction (III/95) for endocrine-disrupting potential
- ⚠ Skin sensitization and irritation reported
- ⚠ Endocrine disruption concern identified by SCCS
- ⚠ Limited to specific product types and concentrations in EU
Safety Score
Caution
Based on EU regulatory data, published safety research, and ingredient function analysis.
References
EU CosIng Database
European Commission cosmetic ingredient registry
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Download LuxSenseThis information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional for skin concerns or allergies.