POLYPHENYLSILSESQUIOXANE is graded A (Safe) by Expert·ING, based on COSING, FDA regulatory data.

POLYPHENYLSILSESQUIOXANE

Safety grade: A

This is a silicone-based powder that acts like tiny, invisible spheres in cosmetic products. It's engineered in a lab to help products stick together and create a smooth, matte finish on skin.

This ingredient helps bind product ingredients together, creates a protective layer on skin, and reduces shine by scattering light for a more opaque, matte appearance.

Graded using: COSING, FDA.

Last verified: May 26, 2026