Lactic Acid as a preservative

Lactic acid and sodium lactate are commonly used in the food industry as preservatives.I believe it's something specific about the lactate ion than acidity itself.

What % of lactic acid is needed to preserve a solution? Can cosmetic products be preserved with lactic acid alone?

Comments

  • MicroformulationMicroformulation Member, Professional Chemist
    Lactic acid is not adequate as a standalone preservative. Decreasing the pH can assist as part of your preservative system but it should be coupled with other methods as well.

    Don't make the mistake of believing Food preservation has direct parallels to Cosmetic preservation. Processed food can be packaged more securely and they also use a great deal more preservation strategies based upon free water content. We hear about free water (Aw) in cosmetics as part of a preservative, but it is much more common and feasible in Food preservation. That is why their is a separate field, Food Science, a separate discipline entirely.
    markfuller@microformulation.com Microformulation.com Microformulation Cosmetic Consulting provides Custom Formulations for both large Commercial accounts as well as smaller entrepreneurs. We can provide Naturally compliant Formulations under the NSF, NPA, Whole Foods and USDA Organic Certifications. BS.Pharm Albany College of Pharmacy, Union University.
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