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

NITROUS ACID

Safety grade: A

A preservative derived from nitrogen compounds that helps keep cosmetic products fresh by preventing the growth of bacteria and other microorganisms. It works to extend shelf life and maintain product stability, making it useful in formulations where long-term protection is needed.

Graded using: COSING.

Last verified: June 9, 2026