PEI-30 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

PEI-30

Safety grade: A

PEI-30 is a synthetic polymer made in a laboratory that helps control how thick or thin a product feels. It works by modifying the texture and flow of cosmetic formulations.

This ingredient thickens or thins cosmetic products to achieve the desired consistency, making them easier to apply and improving their overall feel on the skin.

Graded using: COSING.

Last verified: May 26, 2026