PEG-55 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

PEG-55

Safety grade: A

PEG-55 is a synthetic ingredient made from petroleum that acts like a water-loving liquid or thick substance. It helps mix different ingredients together and keeps products feeling smooth and moist.

This ingredient helps bind product ingredients together, attracts moisture to keep skin hydrated, and dissolves other substances to create a uniform texture in cosmetic formulations.

Graded using: COSING.

Last verified: May 26, 2026