USD $13.00-15.00 / Kilogram
USD $1.00-10.00 / Kilogram
USD $12.00-15.00 / Kilogram
1,chemical name: zinc sulfate
2,molecular formula :znso4.h2o, znso4.7h2o
3,molecular weight: 179.48(monohydrate), 287.54(heptahydrate)
4,cas: 7446-19-7(h2o);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.
specification |
gb25579-2010 |
fcc,1996 |
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znso4.h2o |
99.0-100.5 |
98.0-100.5 |
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znso4.7h2o |
99.0-108.7 |
99.0-108.7 |
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as≤ |
0.0003 |
—— |
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alkali metal≤ |
0.50 |
0.5 |
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ph |
pass |
pass |
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se≤ |
0.003 |
0.003 |
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hg≤ |
0.0001 |
0.0005 |
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pb≤ |
0.0004 |
0.001 |
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cd≤ |
0.0002 |
0.0005 |