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

OLETH-4

Safety grade: A

Oleth-4 is a cleansing and conditioning agent made from oleic acid (a natural oil component) that has been chemically processed. It helps mix oil and water together in cosmetic formulas.

This ingredient works as an emulsifier to blend oil and water-based ingredients together, creating a smooth, stable product texture while also helping to cleanse and condition the skin.

Graded using: COSING.

Last verified: May 26, 2026