Sodium dehydroacetate is a derivative of dehydroacetic acid, synthesized from dehydroacetic acid and a base, such as sodium hydroxide [1]. Dehydroacetic acid is typically obtained by the alkaline polymerization of diketene [2]. It is primarily used as a preservative, inhibiting the growth of bacteria and fungi in various applications [3].
The production process of sodium dehydroacetate generally involves the following steps: First, diketene undergoes alkaline polymerization to form dehydroacetic acid. Next, dehydroacetic acid reacts with a sodium base through neutralization to produce sodium dehydroacetate [2]. The resulting solution is then purified, crystallized, and dried to obtain the final product [2].
Sodium dehydroacetate functions as an antimicrobial agent, preventing the proliferation of microorganisms in cosmetic formulations [3]. It helps to extend the shelf life of products, maintaining their quality and safety over time [3]. Its efficacy is dependent on concentration, pH, and the specific microorganisms present [3].
Sodium dehydroacetate is applied in a variety of cosmetic and personal care products, including creams, lotions, shampoos, and other leave-on and rinse-off products [4]. It is particularly useful in formulations where water activity promotes microbial growth, ensuring product stability and preventing spoilage [4].
Sodium dehydroacetate is typically packaged in airtight containers to prevent moisture absorption and degradation [5]. It should be stored in a cool, dry, and well-ventilated environment, away from direct sunlight and incompatible substances, to maintain its stability and efficacy over its shelf life [5].
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