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ADD:Donglan Tuo Village, Wang |
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Wenzhuang Town, Xiqing District, |
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Tianjin, China |
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P.C:300383 |
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TEL:+86-22-23995346 |
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FAX:+86-22-23990742 |
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Mobile:+86-13920818696 |
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Tel/Fax:+86-22-86399961 |
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Sales/Service Tel:+86-15202298304 |
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URL:http://www.znso4.com |
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E-mail:xinxin@znso4.com |
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 Food Grade Zinc Sulfate Heptahydrate |
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Molecular formula ZnSO4 7H2O
Molecular weight 287.56
Physical and chemical property
White or slight-yellow crystal, loose and no agglomeration, easy soluble in water and slightly dissolvable in alcohol and glycerol, insoluble in liquid ammonia and ketone, tending to lose water molecules of hydration in dry air and become white powder appearance. When the temperature is 280℃, it will become no water substance and lose all crystal water. When the temperature is above 500℃, it will decompose.
Relatively density: 1.975
Melting point: 100℃
Use
As supplement nutriment of food, zinc fortifier.
Characteristic and function
- High purity, easy soluble, quick absorbable for human body.
- Low content of heavy metal, Pb, Cd, Hg, Cr and As meet with China Inspection and Quarantine Food Standard.
Packaging and transportation
Plastic woven bag lined with plastic film bag. Standard net weight: 25kg or as customer’s requirement. Avoid moisture during transportation and store. |
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ITEM |
INDEX |
Type |
Premium Grade |
Grade I |
Zn % ≥ |
22.51 |
22.28 |
ZnSO4 7H2O % ≥ |
99 |
98 |
Water insoluble % ≤ |
0.02 |
0.05 |
PH(50g/L solution) ≥ |
3.0 |
3.0 |
Pb % ≤ |
0.001 |
0.002 |
Fe % ≤ |
0.003 |
0.005 |
Cd % ≤ |
0.001 |
0.002 |
Cr %≤ |
0.0005 |
0.001 |
As % ≤ |
0.0005 |
0.0005 |
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