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separation because of the preservative
hello, I am Allina, Italian sworn translator and passionate about diy cosmetics and natural ingredients. I prepare lotions and creams for my family. Recently I’ve discovered a liquid preservative made of potassium sorbate and sodium benzoate. I made it myself according to the recipe sodium benzoate 30% and potassium sorbate 15%. My hair conditioner separated immediately when I added the preservative, no doubt, because of it. What is wrong..? thank you all in advance
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1 Reply
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Emulsions are destabilized by electrolytes.
Basically, using salts like potassium sorbate and sodium benzoate disrupts the micellar structure of your emulsion causing particles to combine, get larger & eventually the system separates. This is why formaldehyde donors and parabens have traditionally been used in emulsion products.
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