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STANDARDS :HG/T2326—2005
|
Item |
index
|
|
First
|
Second
|
|
Super grade
|
First grade
|
Good
|
super grade
|
First grade
|
Good
|
|
Main content |
Zn ( as Zn)% ≥ |
35.70
|
35.34
|
34.61
|
22.51
|
22.06
|
20.92
|
|
ZnSO4.H2O % ≥ |
98.0
|
97.0
|
95.0
|
—
|
—
|
—
|
|
ZnSO4.7H2O?? % ≥ |
—
|
—
|
—
|
99.0
|
97.0
|
92.0
|
|
Matter insoluble % ≤ |
0.020
|
0.050
|
0.10
|
0.02
|
0.050
|
0.10
|
|
PH (50g / L solution) % ≤ |
4.0
|
4.0
|
—
|
3.0
|
3.0
|
—
|
|
Cl % ≤ |
0.20
|
0.60
|
—
|
0.20
|
0.60
|
—
|
|
Pb % ( as Pb) ≤ |
0.002
|
0.007
|
0.010
|
0.001
|
0.010
|
0.010
|
|
Fe % (as Fe) ≤ |
0.008
|
0.020
|
0.060
|
0.003
|
0.020
|
0.060
|
|
Mn % (as Mn) ≤ |
0.01
|
0.03
|
0.05
|
0.005
|
0.10
|
—
|
|
Cd % (as cd)≤ |
0.002
|
0.007
|
0.010
|
0.001
|
0.010
|
—
|
Formula :ZnSO4.7H2O
CAS:7446-20-0
Properties: white granular or powder, orthogonal crystals, have convergence, will pulverization in dry air.Lost one molecular crystal water heated to 3 0 ??, 100 ?? lost six molecular crystal water, 280 ?? lost seven crystallization water molecules, 767 ?? when broken down into ZnO and SO3.Soluble in water, slightly soluble in alcohol and glycerin.Need to be airtight preservation.
USES: mainly used as the material of manufacture zinc barium and other zinc salt, it is also an important auxiliary viscose fiber and vinylon fiber raw material, also used as a dye mordant, preserve the wood and leather agent, bone glue clarifying and preservation agents , medical emetic and fungicide, agriculture used as trace element fertilizer, etc.
Packing: 25 kg / bag or 50 kg / bag, inside plastic outside double packing.
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