3-HYDROXYBUTYRATE/4-HYDROXYBUTYRATE COPOLYMER is graded A (Safe) by Expert·ING, based on COSING regulatory data.

3-HYDROXYBUTYRATE/4-HYDROXYBUTYRATE COPOLYMER

Safety grade: A

This is a biodegradable plastic-like material made by bacteria through a natural fermentation process. It belongs to a family of bioplastics that can be used to create eco-friendly packaging or slow-release delivery systems in cosmetics.

It is used in cosmetic products as a film-forming agent or encapsulation material to help deliver active ingredients to the skin in a controlled manner.

Graded using: COSING.

Last verified: May 26, 2026