... - 101%Usage: Generally for photograph, dye, pesticide rubber, chemical industry, medicine, polymer retarder, desulphurization in fertilizer, ... urea synergist antioxidant, analyse chemical reagent and so.Packing: 25kg (net weight) ... 5% Usage: Generally for photograph, dye, pesticide rubber, chemical industry, medicine, polymer retarder, desulphurization in fertilizer, ...