DHA is most stable at a pH in the range of 4. Over time the cream will migrate down to about 3.9 pH. It will preserve with phenoxyethanol. It does react with proteins and iron oxides. It works best with nonionic emulsifiers.
I have had good results with PE9010 as a preservative.
I have made too many of these products to count. The real secret is treating your DHA as an expendable. Keep it refrigerated until you use it.
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.
Comments
I have had good results with PE9010 as a preservative.
I have made too many of these products to count. The real secret is treating your DHA as an expendable. Keep it refrigerated until you use it.
See website for details www.desertinbloomcosmeticslab.com
cheers