The COSRX BHA Blackhead Power Liquid is a skincare product formulated with Beta Hydroxy Acid (BHA), specifically Salicylic Acid, as its active ingredient. Salicylic Acid is a lipophilic compound that penetrates the surface of the skin to exfoliate dead skin cells and unclog pores. Its keratolytic properties help to prevent the formation of blackheads and whiteheads by dissolving the keratin that holds these impurities in place. With a concentration of 4% Salicylic Acid, the COSRX BHA Blackhead Power Liquid is designed to provide effective exfoliation without causing irritation. The pH of the product is around 4.0, which is optimal for the exfoliating properties of Salicylic Acid to be fully activated. The viscosity of the liquid allows for easy application and absorption into the skin, enhancing its bioavailability and efficacy. Salicylic Acid works by disrupting the bonds between skin cells, promoting their shedding and preventing the formation of comedones. It also has anti-inflammatory properties that can help reduce redness and swelling associated with acne. Additionally, Salicylic Acid has been shown to have antimicrobial effects, targeting the bacteria that contribute to acne formation. Overall, the COSRX BHA Blackhead Power Liquid is a scientifically-backed skincare product that targets blackheads and acne through the exfoliating and anti-inflammatory properties of Salicylic Acid.