... Generally for photograph, dye, pesticide rubber, chemical industry, medicine, < Hydroquinone(HQ) Technical grade;Can be used as intermediates of polymer, monomer inhibitor, dyes ... for film, photos and X-ray film. Quality standard1, Photo-taking grade(GB10552-89) Index itemsIndex(%)Appearance White needle crystalHydroquinone(HOC6H4OH) content99 ...