Hydroquinone is an organic compound formed by the substitution of two para-position hydrogens of benzene with hydroxyl groups. It is a reducing agent and an important antioxidant and polymerization inhibitor. It is a fundamental organic raw material and serves as a crucial raw material, auxiliary agent, and intermediate in the fields of rubber, medicine, dyes, pesticides, and other chemical industries. Its main application areas include the photographic industry (developer for black-and-white film and X-ray film), polymer chemistry (polymerization inhibitor for unsaturated monomers such as acrylate and styrene, commonly used at a concentration of about 200 ppm), the rubber industry (rubber antioxidant and anti-aging agent), the dye industry (manufacturing anthraquinone dyes and azo dyes), the pharmaceutical industry (pharmaceutical synthesis intermediate), water treatment (deoxygenation and corrosion inhibitor for industrial circulating water and boiler water), the petroleum industry (antioxidant for gasoline and other oil products), daily chemical industry (corrosion inhibitor and stabilizer for detergents; hair dye for cosmetics), chemical analysis (photometric determination of phosphorus, magnesium, niobium, copper, silicon, arsenic, etc.; reducing agent for heteropolyacids), and the pesticide industry (pesticide intermediate)