TRIDECETH-21 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

TRIDECETH-21

Safety grade: A

Trideceth-21 is a mild cleaning agent made by chemically modifying a natural oil-based substance. It helps remove dirt, oil, and makeup from skin while being gentle enough for everyday use.

This ingredient works as a cleanser and surfactant to lift away oils and impurities from the skin and help them rinse away with water.

Graded using: COSING.

Last verified: May 26, 2026