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Preservation of acid products
Hi,
I was wondering if formulations with a pH of 3 require preservation or are they self-preserving?
I’ll be working on a 2% salicylic acid serum with a pH of 3 so wondering if that would require a preservative. And if so, which one? Would geogard ECT work for it? In what %?
Please help; I’m new here. Thank you.
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