Caprylhydroxamic Acid (INCI: Caprylhydroxamic Acid) is a white to off-white crystalline powder known as one of the most efficient antimicrobial organic acids used in modern preservation systems. It provides strong chelation activity and disrupts the conditions required for microbial growth, enhancing preservative performance even at low levels.

Alcohol-soluble and easy to incorporate, it is suitable for a wide range of formulations, including serums, lotions, and emulsions. With a recommended usage level of 0.05–0.25%, Caprylhydroxamic Acid offers high preservation efficacy while supporting formulation stability and mildness.