O-TOLYL BIGUANIDE is graded A (Safe) by Expert·ING, based on COSING regulatory data.
O-TOLYL BIGUANIDE
Safety grade: A
O-Tolyl Biguanide is a synthetic chemical compound that helps prevent oxidation and degradation in cosmetic products. It works by protecting formulas from breaking down when exposed to air and light.
This antioxidant ingredient is used to extend the shelf life of cosmetic products and maintain their stability by preventing oxidative damage to other ingredients.
Graded using: COSING.
Last verified: May 26, 2026
Other Antioxidant ingredients
- TOCOPHEROL — Grade A
- TOCOPHERYL ACETATE — Grade A
- BHT — Grade C**
- ASCORBYL PALMITATE — Grade A
- HYDROXYACETOPHENONE — Grade A
- PENTAERYTHRITYL TETRA-DI-T-BUTYL HYDROXYHYDROCINNAMATE — Grade A
- ASCORBIC ACID — Grade A
- CAMELLIA SINENSIS LEAF EXTRACT — Grade A