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What % of Sodium Benzoate (and) Potassium Sorbate in Euxyl K712?
Hello! I hope someone can help me. I am fairly new to skincare formulation. I would like to formulate an unscented facial mist and facial serum for mature and sensitive skin. I would like to avoid parabens and formaldehyde donors in preservatives. I am considering Euxyl K712 (INCI: Sodium Benzoate (and) Potassium Sorbate (and) Aqua. I cannot find a vendor for small quantities for this preservative in the USA, but it seems that I could easily purchase the three ingredients that make up this preservative. Could someone please advise me if it is OK to add Sodium Benzoate and Potassium Sorbate separately to my formulation and at what percentage would each ingredient be included? I do plan to include in my formulation propanediol 1,3, sodium phytate and will adjust the pH with Sodium Citrate. I understand these boost the preservative. Thank you very much for your help!
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