Dehydroacetic Acid (Dehydroacetic Acid)

Dehydroacetic Acid is a cosmetic preservative used to help protect formulations from microbial contamination, supporting product safety and shelf life by inhibiting the growth of certain yeast, molds, and bacteria (often as part of a broader preservative system). It is typically employed in leave-on and rinse-off products—such as creams, lotions, cleansers, shampoos, and styling products—where it can provide effective preservation while maintaining a neutral sensorial impact. Dehydroacetic Acid is most commonly formulated within acidic to mildly acidic pH ranges, and it is frequently paired with complementary preservatives (and/or its salt form) to broaden antimicrobial coverage and optimize performance across different product types. Use levels and regulatory limits vary by market, so formulators generally follow applicable cosmetic regulations and supplier guidance to ensure compliance, stability, and compatibility with the overall formula.