Zinc sulphate,heptahydrate
Molecular formula: ZnSO4·7H2O
Molecular weight: 287.56
Properties: white or slight yellow granular
crystal or needle-like powder. efflorescence to white powder.
dehydrated in 280 °C,
decomposed in 500 °C. relative density 1.975. melting
point 100 °C. S.
Standard: Company standard DT-QSLSX-2006
Technical index: %
Item |
Medicine |
Feedstuff |
Plating |
Mineral
separation |
Fertilizer |
Industry
grade
|
Main assay (as
Zn)°C |
22-23 |
22-23 |
22-23 |
21-22 |
21-22 |
19-20 |
Main assay (as ZnSO4·7H2O) |
97-99 |
97-99 |
97-99 |
94-96 |
94-96 |
92-94 |
Ph value(50g/L solution)≤ |
3.0 |
3.0 |
3.0 |
5.0 |
5.0 |
--- |
Chloride (as CI) ≤ |
0.2-0.6 |
0.2-0.6 |
0.2-0.6 |
0.6-1.0 |
0.6-1.0 |
1.0-1.5 |
Sulfate (as SO4) ≤ |
0.05-0.6 |
0.05-0.6 |
0.6-1.0 |
0.6-1.0 |
0.6-1.0 |
--- |
Mn ≤ |
0.01-0.1 |
0.01-0.1 |
0.01-0.1 |
0.01-0.1 |
0.01-0.1 |
0.01-0.1 |
Fe ≤ |
0.005 |
0.005 |
0.02-0.06 |
0.06-0.1 |
0.06-0.1 |
0.2-0.5 |
Pb ≤ |
0.005 |
0.005 |
0.01-0.05 |
0.01-0.05 |
0.01-0.05 |
0.1-0.5 |
Cd ≤ |
0.001 |
0.001 |
0.01-0.05 |
0.01-0.05 |
0.01-0.05 |
0.1-0.5 |
Cu ≤ |
0.002-0.005 |
0.002-0.005 |
0.01-0.02 |
0.01-0.02 |
0.01-0.02 |
0.1-0.5 |
As ≤ |
0.0005 |
0.0005 |
--- |
-- |
--- |
--- |
Uses:
- emetic, supplement, displacement agent
- zinc supplement and pesticide;
- industrial
material; mordant agent of printing and dyeing, preserve
agent; water treatment agent; mineral separation agent.
Packing, transportation and storage: two-layer
packing, internal packing is PE bag, external packing plastic
woven bag, Net Wt. 50kg. It should be protected by covers
when transportation, avoid rain, moisture, or mixed with
acid / alkali matter and color matter; packed in dry and
airiness place, no contact with acid and alkali and color
matter.
|
