It is hydrogen peroxide, a syrupy liquid compound used as a strong bleaching, oxidizing, and disinfecting agent. It is usually made either in anthrahydroquinone autoxidation processes or electrolytically. The primary use of hydrogen peroxide is in bleaching wood pulp. A more familiar use is as a three percent solution as an antiseptic and germicide. Undiluted, it can cause burns to human skin and mucous membranes, is a fire and explosion risk, and can be highly toxic.