STEARETH-1 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

STEARETH-1

Safety grade: A

Steareth-1 is a gentle cleaning agent made from stearic acid (a fatty acid found in plants and animals) combined with a synthetic component. It helps mix oil and water together in cosmetic formulas.

This ingredient works as an emulsifier and surfactant to blend oil and water-based ingredients into a smooth, stable product while providing mild cleansing properties.

Graded using: COSING.

Last verified: May 26, 2026