Direct zinc oxide 99.5 and 90% Indirect ZnO: 99.9 and 99.7% Feed grade ZnO: 75 and65% Calcined ZnO: 99.5% Zinc oxide grades: indirect/direct process, calcined, reed grade, pharmaceutic and nanometer zinc oxide Property: White powder, odourless, relative density 5.606, stable under normal temperature Insoluble in water and alcohol, soluble in acid, alkaki and amkonium solution Used in rubber, dope cable, porcelain enamel, oil, pottery and porcelain, glass and other chemical industry Packing: in polyethylene film bag with outer polypropylene woven bag, 25kg, 50kg, big sack bag or customized