β-Naphthol, also known as 2-naphthol, is an important organic chemical raw material and synthetic intermediate. With its direct synthesis can produce more than 100 kinds of dyes and pigments. It is widely used in medicine, pesticides, rubber additives, perfumes, leather tanning, textile printing, dyeing and mineral processing agents. Besides, it is used for the manufacture of tobias acid, butyric acid, β-naphthol-3-formic acid, and to manufacture anti-aging agent D, anti-aging agent DNP and other various anti-aging agents.