LITHIUM HYDROXIDE is graded C** (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexIII-SAFETY-.
LITHIUM HYDROXIDE
Safety grade: C**
Lithium hydroxide is a chemical compound made from the mineral lithium combined with a hydroxide group. It's a strong alkaline substance used in hair care products to help adjust pH levels and assist in permanently altering hair texture.
This ingredient works as a pH buffer to maintain optimal alkalinity in hair waving and straightening formulations, and it helps break down the protein structure of hair to create permanent waves or straighten curls.
Graded using: COSING.
- EU COSING — Restricted
Last verified: May 26, 2026
Safer alternatives to LITHIUM HYDROXIDE
- SODIUM HYDROXIDE — Grade B. Strong alkaline buffer that breaks down hair protein like lithium hydroxide does.
- POTASSIUM HYDROXIDE — Grade B**. Alkaline pH buffer with protein-denaturing capability for permanent wave/straightening.
Other Buffering ingredients
- CITRIC ACID — Grade B
- LACTIC ACID — Grade B
- SODIUM CITRATE — Grade A
- TRIETHANOLAMINE — Grade C
- SODIUM LACTATE — Grade A
- UREA — Grade B