Complaint
1. Chemical Name: Zinc sulfate
2.Molecular Formula: ZnSO4·7H2O,
3.Molecular Weight: 287.54(Heptahydrate)
4.CAS: 7446-20-0(7H2O)
5.Character: It is colorless or white crystalline powder, odorlessness. Efflorescence in air. Acid hydrometer is 1.957(25/4) to litmus. Melting point is 100. It's soluble in water and glycerol,insoluble in ethanol and light toxicity, lose crystal water in 280.
6.Usage: It is used as food additives, animal feed, printing and dyeing, timber preservative.Used as analytical reagent.
7.Packing: It is packed with polythene bag as the inner layer, and a compound plastic woven bag as the outer layer. The net weight of each bag is 25kg.
8.Storage and Transport: It should be stored in a dry and ventilative warehouse; kept away form water and moisture during transport; unloaded with care, so as to avoid damage to bags. Furthermore,it should be stored separately from poisonous substances.
| Index | Specification | GB25579-2010 | FCC,1996 | ||
| content w/% | ZnSO4.H2O | Content | ZnSO4.H2O | 99.0 | 99.0 |
| ZnSO4.7H2O | ZnSO4.7H2O | 99.0 | 99.0 | ||
| (As), mg/kg ≤ | As | 0.0003 | -- | ||
| alkali metal w/% ≤ | Alkali metal | 0.50 | 0.5 | ||
| acidity | PH | pass test | normal | ||
| (Se), mg/kg ≤ | Se | 0.003 | 0.003 | ||
| (Hg), mg/kg ≤ | Hg | 0.0001 | 0.0005 | ||
| (Pb), mg/kg ≤ | Pb | 0.0004 | 0.001 | ||
| (Cd), mg/kg ≤ | Cd | 0.0002 | 0.0005 | ||
