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

PEG-4 DIISOSTEARATE

Safety grade: A

This is a man-made ingredient that helps bind together oil and water-based ingredients in cosmetics. It works like a bridge that keeps products from separating into layers.

This ingredient acts as an emulsifier to help mix oil and water components together, creating a smooth, stable product texture.

Graded using: COSING.

Last verified: May 26, 2026