Ferrous Sulfate (FeSO4·7H2O) is a food-grade blue-green crystalline iron(II) salt, the most widely used iron fortificant in flour, infant cereals, and anaemia-prevention supplements due to its high bioavailability and low cost.We supply bulk Ferrous Sulfate sourced from leading China manufacturers, available in powder form for food and beverage manufacturers worldwide. Our Ferrous Sulfate is widely used in salt, weaning mixes, tablets, parenteral iron therapy and animal feed trace-mineral premixes.
Ferrous Sulfate is produced by reacting iron metal with sulfuric acid, followed by crystallisation.
It is supplied as heptahydrate (green crystals), monohydrate (dried, off-white powder) or dried form. Food-grade Ferrous Sulfate meets FCC and USP requirements and is the global standard for iron fortification of flour, rice, salt and complementary foods under WHO/UNICEF programs.
| Item | Specification |
|---|---|
| Appearance | Blue-green crystals (heptahydrate) / off-white powder (dried) |
| Assay (FeSO4·7H2O) | ≥99.5% |
| Iron Content | 19.7–20.1% (heptahydrate) / ≥30% (dried) |
| Ferric Iron (Fe³⁺) | ≤0.4% |
| pH (5% sol.) | 3.0–4.0 |
| Lead | ≤5 mg/kg |
| Arsenic | ≤3 mg/kg |
| Mercury | ≤1 mg/kg |
| Cadmium | ≤1 mg/kg |
| Insoluble Matter | ≤0.05% |
| Identification A | Passes test |
| Identification B | Passes test |
| Arsenic ≤ | 3 mg/kg |
| Fluorine ≤ | 10 mg/kg |
| Lead ≤ | 2.0mg/kg |
| Heavy Metals | - |
| Loss on heating Mg3(PO4)2.4H2O % | 15.0-23.0 |
| Loss on Ignition Mg3(PO4)2.5H2O | - |
| Acid Insoluble Substances ≤ | - |
| Soluble Substances ≤ | - |
| Carbonate | - |
| Chloride | - |
| Sulfate | - |
| Nitrate | - |
| Barium | - |
| Calcium | - |
| Dibasic Salt and Magnesium Oxide | - |
Our MOQ for bulk food/feed ingredient is generally 500 kg. We also support mixed containers — combine Ferrous Sulfate with other food ingredients in one shipment to save on freight.
We provide free samples (100–500g) for quality testing before you place a bulk order. The buyer covers shipping costs only. Samples are typically dispatched within 2–3 business days.
Standard lead time is 7–15 days after order confirmation and payment. For stock items, delivery can be faster. We will confirm the exact timeline before you place the order.
You will receive the original COA (Certificate of Analysis), COO (Certificate of Origin), MSDS, TDS, and relevant certifications directly from the manufacturer. We guarantee full document authenticity and traceability.
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Whether you're sourcing bulk ingredients or mix container, contact our team for pricing, free samples, and technical support.