COSRX BHA Blackhead Power Liquid is a clear, liquid with almost no odor. When pumped out of the bottle, this product is a clear liquid that is easily absorbed. This product is a BHA, or Butylated hydroxyanisole, which is a chemical that exfoliates your skin. Essentially, BHA is supposed to clean deep into your pores and also reduce redness. This product does exactly that, and more! After using Cosrx BHA Blackhead Power Liquid for an extended period of time, my skin definitely became a lot smoother and nicer. The price is nice considering you do not use that much liquid each application, and also you do not need to use it daily. 5 stars. Amazing product.