Water-soluble / specialty fertilizers
Zinc Sulphate — Soluble Zn Source for Soil, Fertigation & Foliar
FOB Black Sea / MENA · CFR/CIF worldwide on request
Indicative price
USD 246–300 / MT
Indicative range, firm quote on request
Key parameters
Full product details
Product overview
Zinc sulphate is the most widely traded inorganic zinc fertilizer — a fully water-soluble salt that delivers zinc and sulphur in a single application. On alkaline calcareous soils across the Indo-Gangetic plain, Anatolian plateau and North African wheat belt, zinc deficiency limits grain yield long before nitrogen or phosphorus become limiting. Zinc sulphate corrects this at a fraction of the cost of chelated alternatives when applied to soil at planting or through fertigation during early vegetative growth.
Monohydrate grade at 33% Zn is the standard export specification: higher zinc density per tonne than heptahydrate, lower moisture content and better flowability in bulk handling. The co-supplied sulphur fraction (17% S) supports protein synthesis in cereals and oilseed crops where sulphur deficiency increasingly accompanies zinc stress on intensively farmed land. Powder form dissolves rapidly in stock tanks; granular grades are available for mechanical spreading on broadacre programmes.
Primary buyers include national fertilizer importers running zinc enrichment programmes for paddy and maize, agricultural input distributors repacking into 1–25 kg retail bags for horticulture and orchard markets, and compound blenders adding zinc sulphate to custom NPK formulations. Production origins span Chinese chemical complexes, Central Asian zinc refineries and European toll processors. HS code 2833.29.
Full specification
| Zinc (Zn) | 33.0% min (monohydrate basis) |
| Sulphur (S) | 17.0% min |
| Water solubility | 99% min at 20°C |
| Water insoluble | 0.1% max |
| Lead (Pb) | 0.002% max |
| Cadmium (Cd) | 0.001% max |
| Iron (Fe) | 0.05% max |
| Moisture | 0.5% max (monohydrate) |
| Form | Crystalline powder or granule — specify at enquiry |
| Alternative grade | Heptahydrate 21–23% Zn on request |
| HS code | 2833.29 |
Loading ports & logistics
Zinc sulphate ships in bulk bags (1,000 kg FIBC), 50 kg PP-woven sacks on pallets, or break-bulk in 20-foot containers from 24 MT minimum. FOB load ports include Tianjin and Qingdao in China, Novorossiysk and Baltic corridor terminals for European-origin material, and Jebel Ali for MENA consolidation. Powder grades require moisture-protected storage at load port — we confirm warehouse conditions and loading sequence at contract stage.
CFR and CIF quotations add ocean freight and marine insurance to destination ports such as Mumbai, Karachi, Mersin, Alexandria and Lagos. Container lots suit importers without bulk discharge infrastructure; FIBC bulk from 300 MT suits blenders and distributors with bagging lines. Lead time is 10–20 days from payment instrument confirmation to ex-works readiness; peak season (pre-monsoon South Asia) may extend scheduling by one to two weeks.
For fertigation buyers, we can arrange pre-screened powder through 40-mesh sieve to minimise sediment in drip stock tanks. Specify mesh requirement and hydrate form in your quote request.
Packaging & documentation
Standard export packaging: 25 kg or 50 kg PP-woven bags with PE inner liner, 1,000 kg FIBC big bags, or 1.2 MT jumbo bags for bulk-container loading. Each lot ships with a mill certificate of analysis covering Zn, S, heavy metals and moisture. On request we arrange SGS or equivalent pre-shipment inspection at load port verifying zinc content and solubility against contract specification.
Document set: commercial invoice, packing list, bill of lading, certificate of origin and fumigation certificate where destination requires it. Payment terms: irrevocable LC at sight or CAD for first-time buyers; established accounts may negotiate open-account structures. Indicate hydrate form, mesh size and bag weight in your request — indicative pricing covers monohydrate powder in 50 kg bags; heptahydrate and granular grades are quoted separately.
FAQ
Should I order zinc sulphate monohydrate or heptahydrate for export?
Monohydrate at 33% Zn is the standard agricultural export grade — higher zinc concentration per tonne reduces freight cost and storage volume. Heptahydrate at 21–23% Zn suits buyers with established local repacking lines who dilute to retail concentrations. Specify the hydrate form in your request so we quote the correct analysis and packaging.
When does zinc sulphate outperform chelated zinc in field programmes?
Zinc sulphate is cost-effective for soil broadcast and basal application on alkaline calcareous soils where zinc fixation is the primary problem. Chelated EDTA or DTPA forms justify their premium in fertigation and foliar programmes on neutral or acid soils where rapid uptake through leaves or drip lines is required. Many distributors stock both: sulphate for soil correction at planting, chelate for mid-season foliar rescue.
Can zinc sulphate be tank-mixed with phosphate fertilizers?
Avoid mixing concentrated zinc sulphate stock solutions with phosphate or calcium sources in the same tank — insoluble zinc phosphate precipitates will form and clog emitters. In drip systems, inject zinc sulphate through a separate line or apply it in a dedicated irrigation pass after flushing phosphate from the lines.
Related products
- NPK + Micronutrients — granular compound with built-in Zn, B and S for one-pass field application
- Calcium Nitrate — soluble Ca + N grade for fertigation alongside micronutrient programmes
- Water-Soluble NPK — multi-ratio fertigation base with optional chelated micronutrient enrichment