Molecular formula: FeSO4.7H2O (seven water) FeSO4.nH2O (dry product)
Molecular formula: FeSO4.7H2O (seven water) FeSO4.nH2O (dry product)
Molecular weight: 278.01 (heptahydrate)
Iron content (heptahydrate): 20%
Mesh number: 95% passes 100 mesh (dry product)
Ferrous sulfate heptahydrate is gray or blue-green granular crystals, odorless, slightly salty, and has an iron smell. It is easy to weather in dry air and gradually oxidizes in humid air to form yellow-brown alkaline iron sulfate.
The dried product of ferrous sulfate is off-white or light green powder, which turns blue-green when reacted with water.
Can be used to prepare milk, milk powder, soy flour, and soy milk powder. It can also be used to fortify candies other than gum.
| Item | Index | |
| FeSO4.7H2O | Dry ferrous sulfate | |
| Ferrous sulfate content % | 99.5-104.5 | 86.0-89.0 |
| Lead（Pb）mg/kg | ≤2 | |
| Mercury（Hg）mg/kg | ≤1 | |
| Arsenic（As）mg/kg | ≤3 | |
| Acid insoluble matter% | / | ≤0.05 |
