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Kojic Acid Dipalmitate Cosmetic Grade Raw Material Pure White Powder for DIY Soaps Creams & Serums Brightens Skin & Lightens Dark Spots. Kojic Dipalmitate is an ester of kojic acid offering superior stability. Acts as a skin whitening agent. It can prevent the formation of melanin by inhibiting the activity of tyrosinase, the effective ratio can be up to 80%. It is compatible together with all kind of preservatives and sunscreen. Kojic acid itself can be prone to instability with color-changes occurring over time, whereas kojic dipalmitate retains its stability for longer. Melting point: 92-95°C. Soluble in oil and esters, insoluble in water. pH: Stable between 3 and 10