... chemical industry and ,rubber industires.Propertieswhite or yellowish fine amorphous powder, smell-less, tasteless. The proportion is 4.42-4 ... % ≤0.10--advantage:products quality best ,low content of heavy metal,best package in China,lowest price on the ... basis of good qualitymain market: Iran ,indonesia ,The United Arab Emirates Russia ,Brazil Greece,Italy ,South africa.Canada ect supplier of zinc ...