Zinc Sulphate Monohydrate (ZnSO₄·H₂O)
Zinc sulphate monohydrate (ZnSO4.H2O) is a white crystalline zinc salt containing 33% or 35.5% zinc by weight, used as a soil and foliar micronutrient fertiliser to correct zinc deficiency, and as a feed grade zinc supplement. It is supplied as fine powder, coarse powder or granules.
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Product Specifications
ZINC SULPHATE MONOHYDRATE FINE POWDER
33% Grade
| Property | Specification |
|---|---|
| Appearance | White Powder |
| Zinc (Zn) Content | 33 % Min. |
| Sulphur (S) Content | 15.00 % Min. |
| Iron (Fe) Content | 1.00 % Max. |
| pH (5% aqueous solution) | Above 4.0 |
| Solubility | Freely soluble in water |
| Moisture Content | 1.00 % Max. |
| Insoluble Matter | 1.00 % Max. |
35.5% Grade
| Property | Specification |
|---|---|
| Appearance | White Powder |
| Zinc (Zn) Content | 35.50 % Min. |
| Sulphur (S) Content | 17.0 % Min. |
| Cadmium (Cd) Content | To customer specification |
| Lead (Pb) Content | To customer specification |
| Arsenic (As ) Content | To customer specification |
| Mercury (Hg ) Content | To customer specification |
| pH (5% aqueous solution) | Above 4.0 |
| Solubility | Freely soluble in water |
| Insoluble Matter | 1.0 % Max. |
ZINC SULPHATE MONOHYDRATE COARSE POWDER
33% Grade
| Property | Specification |
|---|---|
| Appearance | White Powder |
| Zinc (Zn) Content | 33 % Min. |
| Sulphur (S) Content | 15.00 % Min. |
| Iron (Fe) Content | 1.00 % Max. |
| pH (5% aqueous solution) | Above 4.0 |
| Solubility | Freely soluble in water |
| Moisture Content | Approx 1.00% (1.00% Max.) |
| Particle Size (Mesh) | 80+ mesh 65% |
| Insoluble Matter | 1.00 % Max. |
35.5% Grade
| Property | Specification |
|---|---|
| Appearance | White Powder |
| Zinc (Zn) Content | 35.50 % Min. |
| Sulphur (S) Content | 17.0 % Min. |
| Cadmium (Cd) Content | To customer specification |
| Lead (Pb) Content | To customer specification |
| Arsenic (As ) Content | To customer specification |
| Mercury (Hg ) Content | To customer specification |
| pH (5% aqueous solution) | Above 4.0 |
| Solubility | Freely soluble in water |
| Insoluble Matter | 1.0 % Max. |
ZINC SULPHATE MONOHYDRATE GRANULATED (GRANULAR)
33% Grade
| Property | Specification |
|---|---|
| Appearance | White Granular |
| Granular Size | 2.0mm - 4.00mm. |
| Zinc (Zn) Content | 33.00 % Min. |
| Sulphur (S) Content | 15.0 % Min. |
| Iron (Fe) Content | 1.00 % Max. |
| pH (5% aqueous solution) | Above 4.0 |
| Solubility | Freely soluble in water |
| Moisture Content | 1.00 % Max. |
| Insoluble Matter | 1.00 % Max. |
35.5% Grade
| Property | Specification |
|---|---|
| Appearance | White Granular |
| Granular Size | 2.0mm - 4.00mm. |
| Zinc (Zn) Content | 35.50 % Min. |
| Sulphur (S) Content | 17.0 % Min. |
| Cadmium (Cd) Content | To customer specification |
| Lead (Pb) Content | To customer specification |
| Arsenic (As ) Content | To customer specification |
| Mercury (Hg ) Content | To customer specification |
| pH (5% aqueous solution) | Above 4.0 |
| Solubility | Freely soluble in water |
| Insoluble Matter | 1.00 % Max. |
Heavy-metal limits are agreed per buyer specification, with a COA for every lot.
33% vs 35.5% Zinc Sulphate Monohydrate: which grade to choose
Both grades are freely soluble zinc sulphate monohydrate, available as fine powder, coarse powder and granular forms. The table compares their published specifications side by side, followed by guidance on when to use each.
| Property | 33% Grade | 35.5% Grade |
|---|---|---|
| Zinc (Zn) content | 33% min. | 35.5% min. |
| Sulphur (S) content | 15% min. | 17% min. |
| Appearance | White powder | White powder |
| pH (5% aqueous solution) | Above 4.0 | Above 4.0 |
| Solubility in water | Freely soluble | Freely soluble |
| Insoluble matter | 1.0% max. | 1.0% max. |
| Forms available | Fine, coarse, granular | Fine, coarse, granular |
When should you use the 33% grade?
The 33% grade is the standard, cost-effective zinc sulphate monohydrate for correcting zinc deficiency in most field crops through soil and foliar application. It carries a minimum 33% zinc and 15% sulphur and declares an iron limit of 1.0% max. It is widely chosen for bulk basal and broadcast application where a proven, economical zinc source is needed.
When should you use the 35.5% grade?
The 35.5% grade delivers more zinc per kilogram (35.5% min. zinc, 17% min. sulphur). Its heavy-metal limits are not fixed on a standard sheet: they can be manufactured to your required specification under a mutually agreed spec. Choose it for a higher-analysis input, for premium NPK and micronutrient blends, or where tighter heavy-metal control is required.
Which form suits which application?
Fine powder dissolves quickly and suits foliar spraying and fertigation; the coarse powder (supplied as free flowing zinc sulphate) and the granular form suit soil, basal and bulk-blending application. Both grades are freely soluble in water with a pH above 4.0 in a 5% aqueous solution.
What crop-wise application rate should I use?
Zinc application rates vary by country, soil type, crop and local practice, so a single fixed rate is not appropriate to publish. Determine the correct dose for your field in consultation with your local agricultural authority or a qualified agronomist.
Zinc Sulphate Monohydrate by grade
- Granular Zinc Sulphate Monohydrate
- Fine Powder Zinc Sulphate Monohydrate
- Free Flowing Zinc Sulphate (Coarse Powder)
- Feed Grade Zinc Sulphate Monohydrate
Related reading
Zinc Sulphate Monohydrate vs Heptahydrate: key differences explained
Key benefits of Zinc Sulphate Monohydrate (ZnSO₄·H₂O)
- Rapid correction of zinc deficiency
- Promotes healthy root development
- Enhances plant vigour and growth
- Improves photosynthesis efficiency
- Increases crop yield
- Enhances produce quality
- Supplies zinc and sulphur together
- Improves nutrient use efficiency
- Increases tolerance to environmental stress
- Provides long residual effect in soil
- Suitable for a wide range of crops
- Cost-effective micronutrient solution
- Supports balanced plant nutrition in accordance with Liebig's Law of the Minimum, so crop growth is optimised by correcting the most limiting nutrient
Export and supply capability
Chakradhar Chemicals has manufactured Zinc Sulphate Monohydrate (ZnSO₄·H₂O) in India since 1990 and exports to buyers across seven regions, including the United States.
Manufacturing capacity
30,000 MTPA installed capacity at our Muzaffarnagar plant, Uttar Pradesh, India. Bulk supply and repeat contract volumes are supported.
Certifications and compliance
Export markets served
We currently export to the United States and supply buyers across Asia, Africa, Europe, North America, South America, Latin America, Middle East.
Industries we supply
- United States: Animal Feed, Fertilizers, Mining
- Latin America: Industrial Applications
Why buyers choose Chakradhar Chemicals
- More than three decades of manufacturing excellence since 1990
- One of India's leading manufacturers of Zinc Sulphate products
- Installed production capacity of 30,000 MTPA
- Consistent product quality with stringent quality control
- ISO certified manufacturing facility and US FDA registration
- Advanced manufacturing technology with modern laboratory facilities
- Reliable global export experience across multiple countries
- Competitive pricing with timely delivery
- Customized packaging and private labeling options
- Strict compliance with international quality standards
- Long-term focus on customer satisfaction and sustainable business relationships
Packaging and Supply
- Standard Packaging: 25 kg and 50 kg HDPE woven bags with PE inner liner
- Jumbo Bags: 1,000 kg
- Bulk and Custom Packaging: Customized packaging to customer branding and specifications, including private labeling
- Minimum Order Quantity: 1 FCL (full container load) or 1 truckload; custom pack sizes on request
- Production Capacity: 30,000 MTPA installed capacity
- Bulk Supply: Bulk and container-load supply for domestic and export orders
- Export Markets: Asia, Africa, Europe, North America, South America, Latin America, Middle East
- Export Lead Time: Confirmed at the time of order, contact our sales team
- Documentation: Certificate of analysis, safety data sheet and technical data sheet supplied with every shipment
- Incoterms: FOB, CIF, CFR and Ex Works, other terms on request