AMMONIUM THIOGLYCOLATE is graded C** (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexIII-SAFETY-.
AMMONIUM THIOGLYCOLATE
Safety grade: C**
This is a chemical compound that breaks down the protein structure in hair, making it weak enough to remove or reshape. It's the active ingredient in most hair removal creams and chemical hair straightening or perming products.
This ingredient works as a reducing agent that breaks chemical bonds in hair proteins, allowing hair to be dissolved for removal or chemically restructured for permanent straightening or waving.
Graded using: COSING.
- EU COSING — Restricted
Last verified: May 26, 2026
Safer alternatives to AMMONIUM THIOGLYCOLATE
- THIOLACTIC ACID — Grade A. Reducing agent that breaks hair protein bonds for depilation and restructuring.
- AMMONIUM THIOLACTATE — Grade A. Thiol-based reducing agent for hair removal and chemical restructuring.
- THIOGLYCERIN — Grade A. Thiol reducing agent enabling hair dissolution and permanent wave/straightening.
Other Reducing ingredients
- SODIUM METABISULFITE — Grade B
- STANNOUS CHLORIDE — Grade A**
- DIHYDROXYACETONE — Grade A
- SODIUM THIOSULFATE — Grade A
- GLUTATHIONE — Grade A
- SODIUM BISULFITE — Grade B**