SODIUM SULFIDE is graded C (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexIII-SAFETY-.
SODIUM SULFIDE
Safety grade: C
Sodium sulfide is a chemical compound that works by breaking down the protein structure in hair, making it weak enough to be easily wiped away from the skin. It's the active ingredient in chemical hair removal products.
This ingredient is used in depilatory products to dissolve hair at or just below the skin's surface, allowing for painless hair removal without shaving or waxing.
Graded using: COSING.
- EU COSING — Restricted
- Health Canada — Restricted
Last verified: May 26, 2026
Safer alternatives to SODIUM SULFIDE
- AMMONIUM THIOLACTATE — Grade A. Thiol-based reducing agent that breaks disulfide bonds in hair keratin, enabling depilation
- MERCAPTOPROPIONIC ACID — Grade A. Thiol-containing reducing agent that dissolves hair protein structure for chemical depilation
- THIOLACTIC ACID — Grade A. Alpha-hydroxy thiol compound that reduces and dissolves hair at skin surface level
Other Depilatory ingredients
- THIOGLYCERIN — Grade A
- POTASSIUM THIOGLYCOLATE — Grade C**
- COPERNICIA CERIFERA WAX — Grade A
- CALCIUM THIOGLYCOLATE — Grade C**
- THIOGLYCOLIC ACID — Grade D**
- COLOPHONIUM — Grade A