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

PROPYLENE GLYCOL ISODECETH-4

Safety grade: A

This is a synthetic ingredient made by combining propylene glycol (a common moisturizer) with plant-derived oils. It helps mix oil and water together in cosmetic formulas so they blend smoothly instead of separating.

It acts as an emulsifier and surfactant to blend ingredients that don't naturally mix together, creating a uniform, stable product texture.

Graded using: COSING.

Last verified: May 26, 2026