PEI-250 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

PEI-250

Safety grade: A

PEI-250 is a synthetic polymer that acts like a thickener in cosmetic products. It helps create the right texture and consistency so products feel smooth and pleasant on your skin.

This ingredient controls how thick or thin a product is, making it easier to apply and improving the overall feel and performance of creams, lotions, and other formulations.

Graded using: COSING.

Last verified: May 26, 2026