PEG-450 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

PEG-450

Safety grade: A

PEG-450 is a thick, clear liquid made from petroleum that acts like a humectant and thickener in skincare products. It helps hold water in formulations and keeps different ingredients from separating.

This ingredient helps bind product components together, stabilize mixtures so they don't separate, and acts as a solvent to dissolve and distribute other ingredients evenly throughout the product.

Graded using: COSING.

Last verified: May 26, 2026