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

HYDROXY TETRAMETHYLPIPERIDINE OXIDE

Safety grade: A

This synthetic ingredient works as a stabilizer and preservative booster in cosmetics, helping products maintain their quality and shelf life. It protects formulas from breaking down over time, allowing creams, lotions, and serums to stay fresher longer while keeping their intended texture and effectiveness intact.

Graded using: COSING.

Last verified: June 9, 2026