Zinc Sulphate
Zinc Sulphate is a water-soluble inorganic salt with the formula ZnSO4 and CAS number 7733-02-0. It is the standard salt of zinc chemistry, used wherever a soluble zinc ion is required at low cost.
The compound exists in three common hydration states. The heptahydrate ZnSO4 7H2O is white and freely soluble in water; the hexahydrate ZnSO4 6H2O is the intermediate form, stable between roughly 39 and 70 degrees Celsius; and the monohydrate ZnSO4 H2O is the most stable form above 70 degrees Celsius and the preferred shipping form for agriculture and feed.
We source bulk Zinc Sulphate from top China manufacturers for our partners, working with several of them. The manufacturers are in Jiangsu. For this ingredient the minimum order is 25,000 kg and a 20-foot container takes 25 MT, and a smaller requirement can ship in a combined container with other ingredients.
Please send the grade you need, the volume and your destination port, and we will come back with a solution and a price.
or call +86-21-6858 0751
- Minimum order
- 25,000 kg
- Qty in 20' FCL
- 25 MT
- Packaging
- 25 kg kraft paper bag with PE inner liner
- ISO 9001
- HACCP
- Halal
- Kosher
Specifications
Grades / Types Available: Food Grade, Feed Grade
| Item | Specification |
|---|---|
| Appearance | White crystalline granules |
| Assay | ≥ 99.0% |
| Zinc Content | ≥ 22% (heptahydrate) / ≥ 36% (monohydrate) |
| Loss on Drying | Per hydrate spec |
| Heavy Metals (as Pb) | ≤ 10 mg/kg |
| Arsenic | ≤ 3 mg/kg |
| Grade | Monohydrate |
| Purity (Monohydrate) | 99.0-100.5% |
| Alkali metal | ≦0.5% |
| Acidity | Pass test |
| Selenium | ≦0.003% |
| Mercury | ≦0.0001% |
| Lead | ≦0.0004% |
| Cadmium | ≦0.0002% |
Common Markets Grades
Zinc Sulphate is graded by hydration state, purity, and intended sector.
USP and Ph. Eur. heptahydrate assays at 99.0 to 102.0 percent on the anhydrous basis, with controls on heavy metals and arsenic. This grade serves pharmaceutical injectables, ophthalmic solutions, and oral supplements.
Food grade meets FCC monohydrate or heptahydrate specifications and is used in mineral premixes for cereals, infant formula, and clinical nutrition.
Feed grade carries 33 to 35 percent Zn (monohydrate basis) and is the largest-volume nutritional grade for poultry, swine, and ruminant premixes.
Agricultural grade ranges from 21 to 36 percent Zn depending on hydration state, sold as crystalline or granular product for soil application, fertigation, and foliar spray.
Technical and electroplating grades cover broader purity windows for industrial uses including viscose rayon coagulation and zinc plating baths.
Applications
- Oral and injectable zinc supplements, including pediatric zinc therapy for acute diarrhea recommended by the WHO
- Mineral premix component in infant formula, fortified cereals, and clinical nutrition products
- Ophthalmic solutions and astringent eye drops
- Agricultural zinc fertilizer for soil application, fertigation, and foliar spray on cereals, corn, citrus, and rice
- Animal feed micronutrient for poultry, swine, dairy, and aquaculture
- Lawn and turf moss control products
- Viscose rayon spinning bath coagulant
- Electroplating bath constituent for bright and acid zinc plating
- Mordant in textile dyeing and printing
- Wood preservative formulations
- Flotation reagent in lead and copper ore beneficiation
Brands Using Zinc Sulphate
Widely-distributed consumer products that list Zinc Sulphate on the ingredient label.
- Greenway BiotechZinc Sulfate 35.5% Monohydrate Fertilizer ↗Zinc sulphate monohydrate at 35.5% zinc, sold as a soil and foliar micronutrient fertiliser and for moss control.Label verified 2026-05-24
- Ultra Yield MicronutrientsUltra Yield 35.5% Zinc Granular with Sulfur ↗Ultra Yield 35.5% Zinc Granular is derived from zinc sulphate monohydrate, formulated for direct field application and blended fertilizers to deliver zinc and sulfur to crops.Label verified 2026-05-24
- Zinc Nacional (Maximo)Maximo 363 Granular Zinc Sulfate 35.5% Zn ↗Maximo 363 by Zinc Nacional is a granular zinc sulphate monohydrate engineered for direct soil incorporation and broadcast application, delivering 35.5% zinc minimum as an agricultural micronutrient.Label verified 2026-05-24
- McKessonZinc Sulfate 220 mg Tablets (50 mg elemental zinc) ↗McKesson brand zinc sulphate supplements contain 220 mg of zinc sulphate heptahydrate per tablet, supplying 50 mg of elemental zinc as a dietary supplement.Label verified 2026-05-24
Brand names, product names and logos are the property of their owners. They appear here as published evidence that the ingredient is used, taken from the brand's own label or website. Their appearance is not an endorsement, and it does not mean the brand buys from us or from any manufacturer listed on this site.
China Manufacturers of Zinc Sulphate
Top Zinc Sulphate manufacturers in China.
- Jiangsu Dingguan Food Technology Co., Ltd.10 ingredients in the directory
- Jiangsu Zhenghe Ift Corp.7 ingredients in the directory
Jiangsu Zidong Food Co., Ltd.10 ingredients in the directory
Company names and logos are the property of the manufacturers themselves. They are listed here because our own directory records them as producing this ingredient. A listing is not an endorsement by them, and we do not represent them or speak on their behalf.
How We Help Source Zinc Sulphate
Direct Factory Sourcing
We run the whole process: selecting the manufacturer from the top Chinese food ingredient producers, negotiating the price, verifying quality, and coordinating the logistics. You deal with us instead of with several factories at once.
Original Packaging and Documents from the Manufacturer
The manufacturer sends your Zinc Sulphate out of its own factory in the original packing, through to your destination port. The COA, COO, MSDS, TDS and any certifications reach you from the manufacturer as well.
Free Samples and Lead Time
We send 100 to 500 g free for your own laboratory to test and you cover only the courier, usually within 2 to 3 working days. ETD is usually within 7 to 15 days once the order is confirmed, and we check that date against the factory's own manufacturing schedule before we give it to you.
Combined Shipment
We can load Zinc Sulphate together with other ingredients such as Sodium Acetate, Calcium Citrate and Sodium Lactate into one 20' FCL. If your quantity is small, we can also ship LCL.
Regulatory Status
Zinc Sulphate is approved as a nutrient source and pharmaceutical active across all major markets.
The U.S. Food and Drug Administration affirms Zinc Sulphate as GRAS for use as a nutrient under 21 CFR 182.8997. It also holds USP monograph status for use in injectable nutrition and oral solutions.
In the European Union, Directive 2002/46/EC permits Zinc Sulphate (monohydrate and heptahydrate) as a source of zinc in food supplements, and Regulation (EC) No 1925/2006 permits it in fortified foods.
For animal feed Regulation (EC) No 1831/2003 authorises it as a nutritional additive (functional group: compounds of trace elements).
Pharmacopoeial monographs exist in the United States Pharmacopeia (USP), the European Pharmacopoeia (Ph. Eur.), the British Pharmacopoeia (BP), and the Japanese Pharmacopoeia (JP).
Manufacturing Process
Industrial Zinc Sulphate is made almost entirely by reacting a zinc source with sulphuric acid.
The mainstream feedstock is high-purity zinc metal, zinc oxide, or zinc carbonate. Dissolution in dilute sulphuric acid yields a clear solution that is then purified to remove iron, manganese, lead, and cadmium by oxidation, neutralisation, and zinc dust cementation.
The purified liquor is evaporated and crystallised. Heptahydrate crystallises below 40 degrees Celsius; monohydrate forms at higher temperatures or by partial drying of the heptahydrate. Granulation produces the dust-free product preferred for fertilizer and feed handling.
Lower-purity feed and agricultural grades are also made from secondary zinc sources, including zinc-bearing flue dust from brass production and zinc residues from galvanizing. These streams are leached with sulphuric acid, purified to a lower specification, and crystallised as monohydrate.
