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Zinc sulfate heptahydrate is a highly purified inorganic compound, a zinc salt of sulfuric acid in the form of a crystalline hydrate. Visually, zinc sulfate is a white crystalline powder or colorless, transparent, odorless crystals with an astringent metallic taste. Our product meets strict Pharmacopoeia (Ph. Eur., USP) and Food Codex (FCC) standards, confirming its high purity (category PA - Pro Analysis / analytical grade).
Zinc sulfate heptahydrate (ZnSO4·7H2O) is the most popular form of this compound due to its excellent solubility and bioavailability. Zinc sulfate is highly soluble in water, making it ideal for preparing solutions of various concentrations without sedimentation. If you are looking for guaranteed-quality zinc sulfate for the production of medicines, cosmetics, feed additives, or reagents, this product is the optimal choice.
Technical Specifications
The table lists the actual quality parameters based on the Certificate of Analysis (COA). The product complies with Ph. Eur. standards. 10ED, USP XXXIX, FCC VII.
| Characteristic | Value / Index |
| Product Name | Zinc Sulfate Heptahydrate (ZINC SULPHATE 7-HYDRATE) |
| English Name | Zinc Sulfate Heptahydrate |
| Chemical Formula | ZnSO4 · 7H2O |
| CAS number | 7446-20-0 |
| Molecular weight | 287.54 – 287.56 g/mol |
| Appearance | White crystalline powder / Passes test |
| Packaging | 25 kg / 50 kg bags (polypropylene with liner) |
| EC (EINECS) number | 231-793-3 |
| HS code (customs code) | 2833 29 20 00 |
| Certification | Ph.EUR. 10ED., USP XXXIX, FCC VII |
| Specification | Standard Grade: PA (Pro Analysis / Analytical Grade) |
| Applications | Pharmaceuticals, laboratories, food industry, agrochemistry |
| Melting point | ~100 °C (water loss), dec. >280 °C |
| Heavy metals (Pb) | Max. 0.0004% (4 ppm) |
| Chromatographic purity | - (Determination by complexometry) |
| Ash content (Alkalies, alkali-earths) | Max. 0.5% |
| pH (5% solution) | 4.4 – 5.6 |
| Solubility | Very soluble in water |
| Density / Form | 1.97 g/cm³ / Crystals |
| Storage Conditions | In a dry place, sealed container (hygroscopic) |
| Safety and Toxicity | H302 (Harmful if swallowed), H318 (Eye damage) |
| Content of the main Substances (Assay) | 99.0% – 102.0% |
| Chlorides (Cl) | Max. 0.0005% |
| Iron (Fe) | Max. 0.001% |
| Arsenic (As) | Max. 0.0003% |
Analytical Specifications for Zinc Sulfate Heptahydrate
| Indicator Name | Actual Result | Guaranteed Limits | Units |
| Purity (Complexometry) | 100.2 | 99.0 – 102.0 | % |
| pH of 5% solution (25∘C) | 4.9 | 4.4 - 5.6 | |
| Alkali and alkaline earth metals | < 0.1 | Max. 0.5 | % |
| Iron (Fe) | 0.0006 | Max. 0.001 | % |
| Copper (Cu) | 0.0001 | Max. 0.001 | % |
| Chlorides (Cl) | 0.0003 | Max. 0.0005 | % |
| Calcium (Ca) | 0.0002 | Max. 0.005 | % |
| Magnesium (Mg) | 0.0003 | Max 0.005 | % |
| Lead (Pb) | 0.0001 | Max 0.0004 | % |
| Cadmium (Cd) | < 0.0001 | Max 0.0002 | % |
| Arsenic (As) | < 0.0001 | Max. 0.0003 | % |
| Mercury (Hg) | < 0.0001 | Max. 0.0005 | % |
| Selenium (Se) | < 0.003 | Max. 0.003 | % |
| Identification | Conforms to test | Conforms to test | |
| Solution appearance | Conforms to test | Conforms to test | |
| Acidity | Conforms to test | Conforms to test |
Detailed description and Advantages
Zinc sulfate heptahydrate (zinc sulfate) is a key raw material for many industries. Our product is highly purified (Grade PA), as evidenced by its extremely low impurity content: arsenic (<0.0001%), cadmium (<0.0001%), and lead (0.0001%). This allows it to be used in the most demanding industries.
Why buy this product:
- Highest purity: Compliance with USP/Ph.Eur. guarantees the safety of the product for use in medicine and the food industry.
- Precise formula:The molar mass of zinc sulfate (approx. 287.5 g/mol) and a stable structure with seven water molecules ensure predictable behavior in chemical reactions.
- Efficiency:The high content of the main substance (99.0-102.0%) makes it cost-effective.
Zinc sulfate exhibits chemical properties typical of salts: it hydrolyzes, creating an acidic environment (pH 4.4-5.6), and enters into exchange reactions.High-purity zinc sulfate is typically obtained by dissolving zinc oxide in sulfuric acid, followed by multi-stage purification and crystallization.Zinc sulfate Formed by the interaction of components under strictly controlled conditions, eliminating the presence of foreign inclusions. Zinc sulfate is white, which is important for the production of paints and varnishes and cosmetics, as it does not alter the shade of the final product.
Applications
The areas where zinc sulfate (heptahydrate) is used are extremely diverse. Answering the question of what zinc sulfate is used for, we will highlight the main areas:
1. Pharmaceuticals and Medicine
Zinc sulfate is widely used in medicine due to its antiseptic and astringent properties.
- Zinc sulfate (as a substance) is used in the production of eye drops (as an astringent for conjunctivitis).
- It is included in preparations for zinc deficiency replenishment, immunomodulators, and dermatological agents (acne treatment, wound healing).
- Zinc sulfate in medicine is also used in dentistry and as a component of rehydration solutions.
2. Laboratory Practice and Chemical Industry
Thanks to its analytical grade (Pure for Analysis), this zinc sulfate heptahydrate is used as a reagent in analytical chemistry, for coagulation in viscose production, and for the synthesis of other zinc compounds (e.g., stearate or carbonate). Zinc sulfate formula ZnSO4 7H2O is the standard for many laboratory tests.
3. Agriculture (Premium Segment)
Zinc sulfate is typically used in agriculture as a fertilizer, but this high-quality product is more often used for:
Used in creams, lotions, and shampoos as an active ingredient that regulates sebum secretion and inhibits bacterial growth. What is zinc sulfate from a safety perspective? This is a Class 9 Hazard Substance (for transportation).
4. Cosmetology
Storage Conditions and Safety
instruct you to protect it from moisture, as it is hygroscopic and cakes easily, and may evaporate (lose water) in dry air.
To order bulk quantities of high-purity zinc sulfate heptahydrate, please contact our sales department. We provide a full package of documents, including a COA for each shipment.