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

BUTYROLACTONE

Safety grade: A

Butyrolactone is a clear liquid chemical that works as a solvent, helping dissolve and mix other ingredients together in cosmetic products. It also helps mask or reduce unpleasant odors from other ingredients.

This ingredient dissolves and blends other components in formulas while masking unwanted scents, helping create smooth, stable cosmetic products.

Graded using: COSING.

Last verified: May 26, 2026