STEARETH-4 is graded A (Safe) by Expert·ING, based on COSING, FDA regulatory data.

STEARETH-4

Safety grade: A

Steareth-4 is a gentle cleaning agent made by combining a natural fatty acid (stearic acid) with plant-based sugar molecules. It helps mix oil and water together in cosmetic formulas so they blend smoothly instead of separating.

This ingredient works as an emulsifier and mild cleanser to help blend oily and watery ingredients together in products while also aiding in gentle cleansing.

Graded using: COSING, FDA.

Last verified: May 26, 2026