Ferrous sulphate anhydrous (FeSO4, CAS 7720-78-7) is an iron nutrition fortifier supplied as pale yellow-beige granular powder by SUNWAY. It is formulated for commercial users in the food fortification, premix, and agricultural nutrient sectors who require accurate iron content and low heavy metal levels. Our food-grade ferrous sulphate is produced under controlled drying conditions to minimize oxidation, with each lot tested for Fe²⁺ content and impurity limits before dispatch.
Item | GB29211-2012 | |
Content (FeSO4 basis) | Ferrous sulphate heptahydrate | Ferrous sulphate anhydrous |
99.5-104.5% (on FeSO4·7H2O) | 86.0-89.0% | |
Lead (Pb), mg/kg ≤ | 2 | 2 |
Arsenic (As), mg/kg ≤ | 3 | 3 |
Mercury (Hg), mg/kg ≤ | 1 | 1 |
Acid Insoluble, w% ≤ | — | 0.05 |
Molecular Formula | FeSO4·7H2O | FeSO4 |
Molecular Weight | 278.02 (Heptahydrate) | 151.91 (Anhydrous) |
The above table reflects the national food safety standard GB29211-2012. Full CoA reports include Fe²⁺ content, total iron, and sulfate levels for enterprise customers requiring detailed formulation data.
Used as an iron source in fortified wheat flour, infant cereals, and nutritional meal replacement products to address iron deficiency at population level.
Incorporated into vitamin-mineral premixes for multivitamin tablets and sachet products, where accurate iron dosage and flow properties are required.
Applied as a trace element fertilizer for crops showing iron chlorosis, and in hydroponic nutrient solutions for greenhouse cultivation.
· Packaging: 25kg net weight per woven polypropylene bag with polyethylene inner liner; palletized and stretch-wrapped for container shipment.
· Storage: Store in a dry, ventilated warehouse, separated from toxic substances. Keep bags sealed after opening to prevent moisture absorption and oxidation.
· Shelf Life: 24 months from production date under dry storage conditions.
· Transport: Handle with care to avoid bag damage; protect from rain and moisture during transit.
SUNWAY ferrous sulphate anhydrous is manufactured to meet Chinese food safety standard GB29211-2012, with heavy metal limits controlled at levels suitable for direct food contact. For industrial clients requiring additional compliance, we provide:
· Batch-specific CoA with Fe²⁺ assay and heavy metal results
· Compliance statement for food fortification applications
· Factory audit documentation for long-term supply agreements
· Technical support for dosage calculation and formulation integration
Anhydrous ferrous sulphate (FeSO4) contains approximately 36% elemental iron, while heptahydrate (FeSO4·7H2O) contains about 20% elemental iron. The anhydrous form is preferred for premixes and dry blends due to its lower water content and better flow stability.
Ferrous sulphate may react with tannins or phenolic compounds, potentially causing darkening in certain food matrices. We recommend conducting small-scale trials in your specific product before full-scale production.
Standard supply is by 25kg bags loaded into 20ft or 40ft containers. Recurring supply agreements for monthly delivery are available for enterprise customers with stable production schedules.
Ferrous sulphate is generally permitted in organic production under specific standards as a soil amendment and nutrient source. However, food-grade applications in organic processed foods may have additional restrictions. Please verify against your target market's organic certification requirements.