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To the other portion, add 2.0 mL of standard sodium chloride solution (prepared by dissolving 0.126 g of sodium chloride, dried at 105C for 2 hours, in water in a 1000 mL volumetric flask and diluting to volume to obtain a solution containing 50 g of sodium per 1 mL), dilute with water to volume, mix well, and use as the reference solution
Ni Y, Zhang Y, Zheng L, et al
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By inhibiting the tyrosinase activity, it promotes skin brightening and evens skin tone