Copper sulphate pentahydrate Molecular Formula: CuSO45H2O Molecular Weight: 249.68 Properties: copper sulphate Blue transparent crystal, relative density: 2.29. Easily soluble in water, little air-slaking in the air ,aqueous solution is acidic;Soluble in methanol and glycerol; slightly soluble in ethanol.Transform into trihydrate salts(30C),monohydrate salts(110 C) when be heated;then 258C change into white powders anhydrous salts. Usage: For the manufacture of other cupric salts(Copper cyanide,cupprous chloride,cupprous oxide); monoazo dyes contain copper; as poisoning agent for ship bottom antifouling paint ;as catalyst for the synthesis of perfumes and dyes intermediates; as bactericide, insecticides etc. Specification: Item second quality First quality Best quality Feed grade Electroplating grade Copper sulfate (CuSO4¡¤5H2O) %¡Ý 94 96 98 98.5 99 Acidity (H2SO4) % 0.2 0.2 0.2 0.2 0.2 Insol. in water% 0.2 0.2 0.2 0.2 0.1 Pb % 10ppm 10ppm 10ppm 10ppm Arsenic 5ppm 5ppm 5ppm 5ppm Feed grade standard: HB2932-1999 ohter grade standard: GB437-93. 25kg.Bag, woven bag with plastic lining.