STRONTIUM SULFIDE is graded C (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexIII-SAFETY-.
STRONTIUM SULFIDE
Safety grade: C
Strontium sulfide is a chemical compound that works by breaking down the protein structure of hair, allowing it to be easily wiped or rinsed away from the skin. It's a key active ingredient in some hair removal creams and powders.
This ingredient is used in depilatory products to chemically dissolve hair at the skin's surface, making hair removal quick and painless without razors or waxing.
Graded using: COSING.
- EU COSING — Restricted
- Health Canada — Restricted
Last verified: May 26, 2026
Safer alternatives to STRONTIUM SULFIDE
- AMMONIUM THIOLACTATE — Grade A. Chemically dissolves hair via reducing agents, similar mechanism to strontium sulfide.
- MERCAPTOPROPIONIC ACID — Grade A. Reduces disulfide bonds in hair protein to enable chemical hair removal.
Other Depilatory ingredients
- THIOGLYCERIN — Grade A
- POTASSIUM THIOGLYCOLATE — Grade C**
- COPERNICIA CERIFERA WAX — Grade A
- THIOLACTIC ACID — Grade A
- CALCIUM THIOGLYCOLATE — Grade C**
- THIOGLYCOLIC ACID — Grade D**
- COLOPHONIUM — Grade A