Cosrx BHA Blackhead Power liquid is a water like texture with a faint chemical like smell. It contains 4% BHA (Beta -Hydroxyl Acid), an oil-soluble chemical exfoliant that clears dead skin cells from deep with in pores to minimize the appearance of pores and prevents breakouts. With its anti- bacterial and anti-inflamatory properties it is perfect for those with oily and Acne-prone skin type.