ALUMINUM ZIRCONIUM TETRACHLOROHYDRATE is graded D (High Concern) by Expert·ING, based on COSING regulatory data. It is restricted under Sephora Clean (Prohibited).
ALUMINUM ZIRCONIUM TETRACHLOROHYDRATE
Safety grade: D
This is a metallic compound made from aluminum and zirconium that works by forming a plug in your sweat ducts to reduce perspiration. It's one of the most common active ingredients found in antiperspirant deodorants.
This ingredient reduces underarm sweat and wetness while also helping control odor, making it effective as both an antiperspirant and deodorant in personal care products.
Graded using: COSING.
- EU COSING — Restricted
- Health Canada — Restricted
- Sephora Clean — Prohibited
Last verified: May 26, 2026
Safer alternatives to ALUMINUM ZIRCONIUM TETRACHLOROHYDRATE
- ALUMINUM CHLOROHYDRATE — Grade C. Aluminum salt antiperspirant with identical sweat-blocking mechanism.
- ALUMINUM SESQUICHLOROHYDRATE — Grade A. Aluminum salt antiperspirant, gentler alternative with same active function.
- SODIUM BICARBONATE — Grade A. Absorbs moisture and neutralizes odor without blocking sweat glands.
- POTASSIUM ALUM — Grade A. Astringent salt that reduces sweat and moisture on skin.
Other Astringent ingredients
- ALCOHOL — Grade A**
- CAMELLIA SINENSIS LEAF EXTRACT — Grade A
- CALCIUM CHLORIDE — Grade A**
- ZINC SULFATE — Grade C
- MENTHA VIRIDIS LEAF OIL — Grade C