First, the chemical name: Zinc sulfate, molecular formula: ZnSO4.H2O, ZnSO4.7H2O three molecular weight: 179.49 (monohydrate), 287.58 (g water) Fourth, CAS: 7446-19-7 (monohydrate); 7446-20 -0 (heptahydrate) V. Performance: colorless crystal, small needle-like or granular crystalline powder, odorless, to air weathering. The solution is acidic to litmus gravity 1.957 (25/4 ℃), a melting point of 100 ℃ at 280 ℃ lost 7H2O, dissolved in water and glycerin, insoluble in alcohol, toxic bottom. Sixth, use: food supplements, animal feed, mordant, wood preservatives, analytical reagent. 7, Packing: lined with polyethylene plastic bag, coat plastic woven bag of 25Kg. Eight, storage and transport: It should be stored in a dry, ventilated and clean warehouse, kept away from moisture, heat, transport to prevent rain and moisture, should be stored separately from poisonous substances. Quality Index Specification GB25579-2010 FCC, 1996 content w /% ZnSO4.H2O Content ZnSO4.H2O 99.0-100.5 98.0-100.5 ZnSO4.7H2O ZnSO4.7H2O 99.0-108.7 99.0-108.7 arsenic (As), mg / kg ≤ As 0.0003 - - alkali and alkaline earth metal w /% ≤ Alkali metal 0.50 0.5 acidity PH test normal by selenium (Se), mg / kg ≤ Se 0.003 0.003 mercury (Hg), mg / kg ≤ Hg 0.0001 0.0005 Lead (Pb), mg / kg ≤ Pb 0.0004 0.001 cadmium (Cd), mg / kg ≤ Cd 0.0002 0.0005