Ferrous sulphate heptahydrate is a blue-green crystal, commonly known as alum, produced naturally as hydroalum.At 90ºC, it can lose 6 crystal water to form a white monohydrate, and at 300ºC, it can lose all crystal water to form anhydrous substance.In the air, the alum will also be weathered and lose crystal water, and it will be oxidized to ferric sulfate Fe2(SO4)3 and become a yellowish-brown powder, so it needs to be sealed and preserved.Ferrous sulphate is used to make blue-black ink, wood preservatives, inorganic pigments, fabric dyeing mordants.
Application:
In industry, it is used for manufacturing iron salt, ink, iron oxide red and indigo, as mordant, tanning agent, water purifier, wood preservative and disinfectant, etc.Used in agriculture as fertilizer, herbicide and pesticide.
Spefification:
| Chemical Properties | Typical Value |
| FeSO4.7H2O | 98% min |
| Fe | 19.7% min |
| As | 0.002 max |
| Pb | 0.0002 max |
| Cd | 0.0002max |
Q: Are you factory?
A: Yes, we are factory.
Q: How is your quality?
A: We have top grade production equipment and precision measuring instruments and we also have engineers and technicians carry out quality control.
Q: Can you supply free samples?
A: 1kgs free sample is available, but freight charges will be at your account, The charges will be return to you or deduct from your order in the future.
Q: What about the payment?
100% T/T in advance, 30% T/T in advance, the balance 70% against the B/L copy, Irrevocable L/C at sight
Q: The MOQ is?
A: MOQ is usually 1 ton, special products can be coordinated with each other.
Q: Can I visit your factory?
A: Yes, we welcome you to visit our factory at anytime
Q: How about your delivery time?
A: Usually the shipment is within 15 days after confirming receipt of your payment, some products maybe need longer time.