UNDECETH-40 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

UNDECETH-40

Safety grade: A

Undeceth-40 is a synthetic cleaning and conditioning agent made by chemically processing a natural oil. It helps mix oil and water together in products and makes skin feel soft and smooth.

This ingredient stabilizes emulsions to keep products from separating, conditions the skin, and acts as a gentle cleanser that helps blend different formula components together.

Graded using: COSING.

Last verified: May 26, 2026