1
,
Chemical
N
ame:
Zinc sulfate
2
,
Molecular Formula : ZnSO
4.H
2O, ZnSO
4.7H
2O
3
,
Molecular
W
eight: 179.48(Monohydrate), 287.54(Heptahydrate)
4
,
CAS: 7446-19-7(H
2O);7446-20-0 (7H
2O)
5
,
Character: It is
colorless or white crystalline powder, odorlessness. Efflorescence in air. Acid hydrometer is 1.957(25/4ºC) to litmus. Melting point is 100ºC. It's soluble in water and glycerol, insoluble in ethanol and light toxicity, lose crystal water in 280ºC.
6
,
Us
age: 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.
Quality indicators |
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 salt sw/% ≤ |
Alkali metal |
0.50 |
0.5 |
Acidity |
PH |
tested |
normal |
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 |