DITHIODIGLYCOLIC ACID is graded A (Safe) by Expert·ING, based on COSING regulatory data.
DITHIODIGLYCOLIC ACID
Safety grade: A
Dithiodiglycolic acid is a chemical compound made from amino acids that acts as a powerful reducing agent. It helps break down and reshape the structural bonds in hair and skin.
This ingredient is used in hair relaxers, permanent waves, and depilatory products to break down protein structures, making hair straighter or easier to remove from the skin.
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**