NINHYDRIN is graded A (Safe) by Expert·ING, based on COSING regulatory data.
NINHYDRIN
Safety grade: A
Ninhydrin is a chemical compound that helps prevent oxidation and degradation in cosmetic products. It works by neutralizing harmful reactive molecules that can break down other ingredients or cause discoloration.
This ingredient functions as a reducing agent to protect cosmetic formulations from oxidative damage, helping maintain product stability, color, and effectiveness over time.
Graded using: COSING.
Last verified: May 26, 2026
Other Reducing ingredients
- SODIUM METABISULFITE — Grade B
- THIOGLYCERIN — Grade A
- STANNOUS CHLORIDE — Grade A**
- DIHYDROXYACETONE — Grade A
- SODIUM THIOSULFATE — Grade A
- GLUTATHIONE — Grade A
- THIOLACTIC ACID — Grade A
- SODIUM BISULFITE — Grade B**