Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate is a hindered-phenol antioxidant (also known as the industrial stabilizer Irganox 1010) used in cosmetic formulations to prevent oxidation and rancidity of oils, fats, and other ingredients. It functions primarily as a formulation stabilizer rather than a skin-active treatment.
| Reported effect | How often | Notes |
|---|---|---|
| Allergic contact dermatitis | Rare | Isolated reports of sensitization to this antioxidant; patch-test positive reactions are uncommon. |
| Skin irritation | Very rare | Generally considered low-irritant at cosmetic-use concentrations. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.