Potassium 4-methoxysalicylate, also known as 4-MSK, is a salicylic acid derivative. Its International Nomenclature Cosmetic Ingredient (INCI) name is Potassium Methoxysalicylate. Chemically, it is the potassium salt of 2-hydroxy-4-methoxybenzoic acid. It is commonly used in products designed for ...
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