Caprylhydroxamic Acid
Also Known As: Octanamide, N-Hydroxy-
What Is It? Caprylhydroxamic Acid is an organic compound primarily used in the cosmetic industry. It functions as a chelating agent, which means it binds to metal ions to stabilize formulations and prevent them from degrading. Additionally, it acts as a preservative, inhibiting the growth of mold and bacteria in water-based products.
What Makes It Different? Caprylhydroxamic Acid is unique because it remains effective across a wide pH range, unlike many other preservatives that are pH-dependent. This versatility allows it to be used in various formulations, including those that are waterless (anhydrous). It is often combined with antimicrobial glycols like propanediol to create a "preservative-free preservative system," which is highly valued in natural and clean beauty products.
Where Does It Come From? Caprylhydroxamic Acid is synthesized through a process called transamidation, where either methyl caprylate or ethyl caprylate reacts with hydroxylamine. This reaction produces Caprylhydroxamic Acid and methanol or ethanol as byproducts. The final product is then purified through recrystallization.
Where Is It Used? Caprylhydroxamic Acid is widely used in skincare and haircare products. In skincare, it is found in lotions, creams, and serums to ensure product stability and safety. In haircare, it is used in shampoos and conditioners for its mild preservative properties and moisturizing benefits. It is also suitable for sensitive skin types and is considered non-toxic.
Is It Sustainable? Caprylhydroxamic Acid can be derived from plant-based sources like coconut oil, making it a more sustainable option compared to synthetic preservatives. However, the sustainability of its production depends on the sourcing and processing methods used.
Sustainability Issues Related to Its Production While Caprylhydroxamic Acid itself can be plant-based, the chemical synthesis process involves the use of solvents like methanol or ethanol, which can have environmental impacts. The production process also requires energy and resources, contributing to its carbon footprint. Ensuring sustainable sourcing of raw materials and adopting greener synthesis methods can help mitigate these issues.