Cosrx BHA Blackhead Power Liquid is a exfoliating face tonic water for all skin types. Goodbye blackheads! BHA Blackhead Power Liquid is the solution for impurity-free skin. This exfoliating liquid contains BHA and Niacinamide, which work together to gently exfoliate the skin and control oil levels. Recommended for those accustomed to mid-level acids, this product clears clogged pores, prevents pimples and reduces skin blemishes while maintaining the balance of oil production in the skin. Ideal for oily and rash-prone skin.