4MSK, a saponin acid derivative, is mild and low-irritating, with an antibacterial rate of 99.99% against Propionibacterium acnes and Malassezia. It is a colorless or light yellow liquid with a recommended dosage of 0.1-0.5%. It is soluble in alcohol and oil.

ZLEY®Potassium methoxysalicylate

INCI:	Potassium Methoxysalicylate
Properties:	Lightens and balances skin tone, and reduces dark spots and age spots. Inhibits the activity of the enzyme tyrosinase, which is essential for melanin production.
Appearance:	White or off-white powder
Recommended dosage:	0.1-3.0%
Solubility:	Soluble in water

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