PEI-10 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

PEI-10

Safety grade: A

PEI-10 is a synthetic polymer made in the laboratory that helps control how thick or thin a cosmetic product feels. It's used to adjust the texture and consistency of creams, lotions, and other beauty products.

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

Graded using: COSING.

Last verified: May 26, 2026