:::: Hydroquinone :::: Commodity：Hydroquinone 　　　　 （Photographic grade） Ｍolecular formula：1,4-C6H4(OH)2 Structural：HO- -OH Molecular weight：110.12(According to fhe international atomic weight of 1987) Specification： Appearance：White acicular crystal or crystalline powder Content：≥99%-101% Melting Point：171℃-175℃ Residue after ignition：≤0.05% Fe：≤0.002% Pb:≤0.002% Usage： 　　 Generally for photograph,dye,pesticide rebber,Chemical industry,medicine,polymer retarder,desulphurization in fertilizer,urea synergist antioxidant,ansayse chemical reagent and so on. Package,Storage and Transportation： (1)25kg(net weight)kraft paper bag lined with two plastic bags. (2)Keep in cool,dry and ventilating place. (3)Go through transporting formalities under organ snd poison items.The railway dangerous goods code is 84161