Zinc sulfate

Zinc sulfate (CAS 7733-02-0) is an inorganic zinc salt supplying bioavailable zinc.

Where is Zinc sulfate used?

• Agriculture: corrects zinc deficiency in crops; incorporated into fertilizer blends and animal feed premixes for livestock nutrition
• Water treatment: coagulation aid and algaecide in municipal and industrial systems
• Textile and leather processing: fixes colorants and controls microbial growth in dyeing and tanning baths
• Pharmaceutical and personal care: active ingredient in ophthalmic solutions and astringent formulations
• It is also utilized in anti-dandruff products and topical applications.
• In the feed sector, meets the zinc requirement necessary for healthy development of animals.
• In the pharmaceutical industry, used in various therapeutic products, especially dermatological products for acne treatment due to anti-inflammatory properties.
• In anti-corrosion coatings for metals by electroplating, metallization or immersion techniques, and in paints as pigments and/or anti-corrosion substances.

Formulation notes

• Foliar doses are applied at 10-15 day intervals, while drip irrigation and soil doses are applied weekly.
• It is added to animal feed as an essential zinc source at levels up to several hundred mg per kg of feed.

Typical specification

• Zinc sulfate monohydrate typically has an assay of at least 98.0% as ZnSO4·H2O or 34.5–36.5% as Zn.
• Loss on drying at 105°C is typically ≤1.0 wt%.
• Water-insoluble matter is typically ≤0.05–0.10 wt%.
• Available as a crystalline powder or granulate.

Regulatory status

• Authorized for use in organic agriculture as a feed additive under Regulation (EC) No 889/2008.
• Under EU CLP, harmful if swallowed, causes serious eye damage and is very toxic to aquatic life with long-lasting effects.
• For transport, assigned UN Class 9, packing group III.
• Not subject to restriction under REACH.

Storage, packaging and handling

• Store in a cool, dry, well-ventilated area, keep sealed, protect from moisture, and segregate from incompatible materials.

Frequently asked questions about Zinc sulfate

What is the zinc migration limit for food-contact plastics under EU rules?

Under Regulation (EU) No 10/2011, plastic materials and articles intended to come into contact with foodstuffs must not release more than 25 mg of zinc per kg of food.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.