PEG-9 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

PEG-9

Safety grade: A

PEG-9 is a lightweight liquid ingredient made from petroleum that acts like a humidifier for your skin and helps dissolve other ingredients in cosmetic products. It's commonly used in lotions, serums, and makeup to keep products smooth and easy to apply.

PEG-9 attracts water to the skin to keep it hydrated while also helping to dissolve and blend various ingredients together in cosmetic formulations.

Graded using: COSING.

Last verified: May 26, 2026