Bulk supply · Industrial Salts & Inorganics
Zinc sulphate monohydrate and heptahydrate in 50 kg bags and one tonne jumbos, for micronutrient, feed, viscose and plating use. Price on request against your quantity and delivery point.
Also searched as: zinc sulphate price, zinc sulphate monohydrate, zinc sulphate heptahydrate, zinc sulphate 33, zinc sulphate 21, ZnSO4
What we supply
Zinc sulphate is traded in two hydrates and the difference is almost entirely about how much water you are paying to transport. The monohydrate is the concentrated form; the heptahydrate carries seven waters of crystallisation and correspondingly less zinc per bag. The two grades in the table above — 33 per cent and 21 per cent zinc — are the Indian Fertiliser (Control) Order specifications for monohydrate and heptahydrate respectively, which is the benchmark most Indian buyers quote against whether or not the material is going to a field.
Zinc deficiency is the most widespread micronutrient deficiency in Indian soils, and zinc sulphate is the standard and cheapest way to correct it, which is what makes this a high-volume product here. Outside agriculture the same salt goes into animal feed premixes, the spin bath in viscose rayon, zinc plating electrolytes and froth flotation, where it is used to depress sphalerite. Monohydrate is the practical choice for blending and for anything shipped a long distance; heptahydrate dissolves faster and is preferred for spray solutions and liquid dosing.
Grades & packing
These are the formats we most commonly supply. Other grades, packing sizes and pack marking are available — ask at the enquiry stage.
| Product | Formula | Grade | HSN | Packing |
|---|---|---|---|---|
| Zinc Sulphate | ZnSO₄·H₂O / ·7H₂O | Mono 33% Zn / hepta 21% Zn (FCO) | 2833 29 90 | 50 kg bag · 1 MT jumbo |
No tested values are published here. The certificate of analysis for the batch actually loaded travels with the despatch documents, and a representative COA and the safety data sheet go out before any commercial discussion.
Applications
Correcting zinc deficiency by soil application or foliar spray, where supply is regulated (see below).
Zinc source in cattle, poultry and aqua feed premixes, against a feed-grade specification.
Spin-bath component in viscose fibre and cellophane production.
Zinc source in acid sulphate and sulphate–chloride plating electrolytes, and in zinc electrowinning. Alkaline zinc baths use zinc oxide as zincate, not zinc sulphate.
Sphalerite depressant in lead–zinc and copper flotation circuits.
Wood preservative formulations and as a corrosion inhibitor in cooling-water programmes.
Handling & storage
Worth reading before you order rather than after. If any of this is a problem at your site, tell us — it usually changes what we would quote.
Price
Zinc sulphate tracks the zinc market and the cost of sulphuric acid, but not tightly: most Indian technical and fertiliser grades are made from zinc ash and dross recovered from galvanising units rather than from LME-grade metal, so the availability of that scrap moves the price as much as the metal does. Compare offers on zinc content, not on rupees per bag: monohydrate at 33 per cent zinc and heptahydrate at 21 per cent are not comparable by weight. We quote per MT in writing, landed, with a stated validity.
Questions
The number of waters of crystallisation, and therefore the zinc concentration. Monohydrate is specified at 33 per cent zinc and heptahydrate at 21 per cent under the Indian FCO, so a tonne of monohydrate carries far more zinc. Heptahydrate dissolves faster, which is why sprayers often prefer it.
Heptahydrate is usually preferred for spray solutions because it dissolves faster and more completely. Once in solution at the same zinc concentration the two are chemically the same, so any difference in leaf response comes from free acid and insolubles in the grade — check those on the certificate of analysis rather than choosing on hydrate alone. Monohydrate is the better choice for soil application and for dry blending, and costs less to freight per unit of zinc.
No — Velora is a bulk supplier and trader, not a manufacturer. Zinc sulphate is sourced from established Indian producers and supplied in 50 kg bags and one tonne jumbos.
Zinc sulphate follows the LME zinc price and sulphuric acid cost, so offers carry a stated validity. Compare offers on zinc content — 33 per cent monohydrate and 21 per cent heptahydrate are not comparable by weight.
Yes. Velora is based in Ahmedabad and supplies zinc sulphate across Gujarat and the rest of India in 50 kg bags and one tonne jumbos, quoted landed at your delivery point.
The HSN code for zinc sulphate is 2833 29 90 (Sulphates — other). There is no dedicated zinc line in the Indian tariff, so zinc sulphate falls to the residual “other sulphates” item. Ignore 2833 26 10, which still circulates online: subheading 2833.26 was deleted from the HS in 2007. Formulated and chelated micronutrient products registered under the Fertiliser (Control) Order are treated differently and have been held classifiable under 3824 99 90. Confirm the heading with your own tax adviser. Source: the Indian customs tariff as listed in the GST HSN directory, checked September 2026.
Documentation
UN 3077 is the usual entry, but producers do not all classify this material the same way. The classification for your lot is on the safety data sheet and the consignor’s declaration, and that is what the consignment ships under.
| Document | What it covers for zinc sulphate | When you get it |
|---|---|---|
| Product specification | Download the product specification sheet for zinc sulphate (PDF) — CAS, formula, grade supplied against, packing, HSN and transport classification. Carries no test results and certifies no batch. | Download now |
| Safety data sheet (MSDS/SDS) | Download the 16-section GHS safety data sheet (PDF) — compiled from PubChem, the ECHA CLP inventory and ILO safety cards. The producer’s sheet for the lot supplied governs and is issued with the consignment. | Download now |
| Representative COA | A producer’s representative certificate of analysis for the grade you specify, obtained at enquiry stage so your QC can assess zinc sulphate against your own specification | Before commercial terms |
| Batch COA | Tested values for the batch actually loaded on your vehicle | With despatch documents |
| Technical data sheet | Handling, storage and materials-of-construction guidance | On request |
| TREM card | Transport emergency information for the driver, on the vehicle | With the consignment |
We do not publish blank certificates to download. A certificate of analysis belongs to a batch, so a generic one tells you nothing about the material on your vehicle — and the safety data sheet is the producer’s document for the grade actually quoted. Ask and both are emailed, usually the same working day.
Related lines
Sourcing desk
You will get a written offer for zinc sulphate with landed price, packing, lead time and a stated validity — not a price that changes on the phone.
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