Salicylic Acid is a beta hydroxyl acid that exfoliates the skin. The Ordinary Salicylic Acid 2% Solution helps exfoliate the inside walls of pores to fight the appearance of blemishes & for better visible skin clarity with continued use. Alcohol-free, oil-free, silicone-free, nut-free, vegan, gluten-free, soy-free, cruelty-free. Ph 3.2-3.5