Basic Physical and Chemical Characteristics
-Chemical Name: Zinc Sulfate Heptahydrate (also known as Glauber's Salt or Zinc Alum)
-Zinc sulfate heptahydrate is the most common hydrate form of zinc sulfate. It appears as colorless prismatic crystals, and the industrial product -is typically white, loose granules.
-It is highly soluble in water and can be rapidly dissolved to form a clear aqueous solution; it is insoluble in nonpolar solvents such as ketones and liquid ammonia.
-Its thermal stability exhibits distinct stepwise dehydration characteristics: it slowly loses water through efflorescence at room temperature; as the temperature rises, it sequentially loses its crystalline water, transforming into anhydrous zinc sulfate when the temperature exceeds 280°C; and thermal decomposition occurs at sustained high temperatures.
-During production and storage, ambient humidity must be controlled to prevent efflorescence and caking; its aqueous solution is slightly acidic and poses a corrosion risk to ordinary carbon steel, so equipment should be made of corrosion-resistant materials.
-Product Categories: Zinc sulfate heptahydrate is available in several grades, including industrial-grade, agricultural-grade, rubber additive-grade, electronic-grade, and pharmaceutical-grade. Each grade is available in different particle sizes: 2–4 mm, 1–3 mm, and <1 mm.
Product Composition and Specifications
(I) Core Ingredients
Primary Ingredient: Zinc sulfate heptahydrate (ZnSO₄·7H₂O), serving as a highly efficient zinc source (Zn²⁺) for industrial production and the core functional component. No auxiliary agents or fillers are added, ensuring pure composition.
(II) Product Specifications
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Zinc Sulphate Heptahydrate |
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Parameters |
Specifications |
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Zinc Sulphate Heptahydrate Code |
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Molecular Formula |
ZnSO4·7(H2O) |
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CAS No. |
7446-20-0 |
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Country of Origin |
China |
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Molecular Weight |
287.58g/mol |
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Grade |
Agricultural Grade / Industrial Grade |
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Nutrient Levels |
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Purity % w/w |
as ZnSO4·7(H2O) Min.99 |
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Total Zn % w/w |
as Zn Min.22.5 |
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Insoluble Matter in Water % w/w |
Max. 0.18 |
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Moisture % w/w |
Max. 5 |
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Cd %(mg/kg) |
2-20 |
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Mg %(mg/kg) |
4-100 |
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Pb %(mg/kg) |
1-10 |
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Gg %(mg/kg) |
<30 |
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As %(mg/kg) |
3-50 |
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PH Value |
4 |
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Package |
25kg. 50kg. 500kg. 1000kg. 1250kg bag and OEM colour bag |
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Physical Characteristics |
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Bulk Density(kg/m³) (tapped) |
900-1200 |
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Sieve Analysis |
<6mm 100% w/w(2-5mm >93% w/w min, <1mm <1% w/w) |
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Product Appearance |
Colorless transparent granules/columnar crystals |
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REMARKS: 1.FOB Tianjin Port. 2.Payment term: 30% prepayment, the rest need be paid before delivery. 3.MOQ: 24 ton per 20GP. 4.Lead time:20-30 days. |
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Application Fields
Chemical Raw Materials
Core raw material for manufacturing zinc salts (zinc stearate, zinc carbonate, zinc borate, etc.), lithopone (zinc barium white), zinc ferricyanide, and other products.
Electroplating and Electrolysis
Used in galvanizing iron wire, formulating electroplating industrial electrolytes, and producing electrolytic pure zinc. Provides high-purity zinc ions to ensure uniform and dense coatings.
Mineral Processing and Water Treatment
Acts as an antibacterial agent in lead-zinc ore flotation (dosage: 500–1200 g/t ore) and as a water quality stabilizer in industrial circulating water treatment.
Material Protection
Serves as a wood preservative and leather preservative to extend material lifespan; functions as a clarifying and preserving agent for bone glue, enhancing product purity and stability.
Textile Dyeing Industry
Acts as a mordant to strengthen dye-fabric bonding, improving dyeing uniformity and color fastness.
Other Applications
Used as an auxiliary material in chemical fiber production and as a laboratory reagent.
Core Advantages of Our Products
Ultra-High Purity and Stability
Utilizing premium zinc oxide as raw material, our precise temperature-controlled reaction, hydrogen peroxide impurity removal, and low-temperature crystallization process ensure stable main content ≥99.0% (premium grade standard) and heavy metal (lead, cadmium) content ≤0.001%. Minimal batch-to-batch variation guarantees process reproducibility in industrial production.
01
Superior Physical Properties
Features uniform crystal morphology, excellent free-flowing characteristics, minimal dust generation, and facilitates precise metering, feeding, and mixing. Easily dissolves in water to form clear solutions without precipitation, enhancing production efficiency and formulation compatibility.
02
Stringent Quality Control
Fully compliant with ISO quality management systems, featuring 6 quality inspection points across all production stages. Impurities detected via ICP-OES (Inductively Coupled Plasma Optical Emission Spectroscopy) ensure guaranteed quality.
03
Eco-Friendly Production Process
Utilizes a closed-loop production system achieving over 98% raw material utilization. Treated wastewater meets discharge standards with zero solid waste pollution, complying with national green chemical production requirements.
04
Outstanding Cost-Performance Advantage
Large-scale production reduces unit costs, offering competitive pricing while maintaining high purity. Custom packaging specifications and purity grades are available to meet personalized production needs.
05
Packaging and Transportation
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Standard Packaging: Double-layer packaging bags with inner plastic and outer woven layers, providing moisture resistance, leak prevention, and abrasion resistance. Standard specification is 25kg/bag; bulk bag packaging can be customized upon request.
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Packaging Labeling: Packaging can be customized according to customer requirements.
(IV) Safety Precautions
- This product is acidic. Avoid direct contact with skin or eyes. Wear gloves and safety goggles during handling. If contact occurs, immediately rinse thoroughly with copious amounts of water.
- Do not ingest. Store in areas clearly marked with "NOT FOR CONSUMPTION" warnings. Keep separate from food and animal feed.
- We have a team of over 20 professional R&D personnel spanning multiple fields, including chemistry and engineering.
- Team members possess extensive R&D experience; key members have previously worked at Merck & Co. in the U.S. and the Max Planck Society in Germany.
QA&QC
Q: Do you offer custom packaging?
A: Yes
Q: Can we customize labels, tags, and packaging printing?
A: Yes
Q: Common modes of transportation for exports?
A: Sea freight
Q: Can you provide a quality inspection certificate or a third-party test report?
A: Yes
Q: Can you guarantee a stable, long-term supply? Do you provide free samples?
A: Yes
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