Water-soluble / specialty fertilizers
Ferrous Sulphate — Soluble Iron for Chlorosis Correction
FOB Black Sea / MENA · CFR/CIF worldwide on request
Indicative price
USD 164–200 / MT
Indicative range, firm quote on request
Key parameters
Full product details
Product overview
Iron chlorosis — interveinal yellowing on young leaves while veins stay green — is the most visible micronutrient disorder on calcareous and alkaline soils across the Mediterranean, Middle East and South Asia. High soil pH locks iron in insoluble ferric oxide forms that roots cannot absorb. Ferrous sulphate heptahydrate (FeSO₄·7H₂O) delivers immediately available Fe²⁺ ions that remain soluble in acid soil zones and low-pH fertigation water, restoring chlorophyll synthesis within one to two growth cycles.
Agricultural grade ferrous sulphate contains 20% Fe and 18.5% S in a fully water-soluble crystalline form. Beyond field crops and orchards, buyers use it in lawn and turf maintenance, greenhouse nutrient solutions, animal feed mineral premixes and industrial water-treatment programmes where soluble iron precipitates phosphorus. The pale green heptahydrate crystals dissolve rapidly at 20°C; monohydrate granules with lower moisture are available for humid-climate storage on request.
Primary export buyers include fertilizer blenders incorporating iron into NPK micronutrient compounds, orchard management companies running spring iron programmes on citrus and grape, national distributors supplying government horticulture subsidy schemes, and water-treatment chemical traders across the Gulf and North Africa. Production origins span Chinese crystalliser plants, Eastern European sulphuric-acid route mills and MENA toll processors. HS code 2833.29.
Full specification
| Iron (Fe) | 20.0% min |
| Sulphur (S) | 18.5% min |
| FeSO₄·7H₂O content | 95.0% min |
| Water insoluble | 0.5% max |
| Lead (Pb) | 0.002% max |
| Cadmium (Cd) | 0.001% max |
| pH (5% aqueous solution) | 3.0–4.0 |
| Appearance | Pale green crystals or granules |
| Form | Heptahydrate (monohydrate on request) |
| HS code | 2833.29 |
Loading ports & logistics
Ferrous sulphate ships in 25 kg PP woven bags with PE liner or 1,000 kg big bags palletised for container loading. Minimum export parcel 200 MT; programmes above 1,000 MT can move on breakbulk with bagged cargo. FOB load ports include Tianjin and Qingdao (China), Novorossiysk and Baltic corridor terminals, plus Jebel Ali transhipment for MENA consolidation.
CFR and CIF quotations add ocean freight and marine insurance to nominated discharge ports — Valencia, Casablanca, Jeddah, Mumbai and Colombo are common destinations for specialty fertilizer parcels. Product is non-hazardous under IMDG but hygroscopic: we specify moisture-proof bagging and desiccant liners for long ocean transits through tropical humidity zones. Lead time 10–20 days from payment instrument confirmation to first day of laycan.
Container stuffing rates 150–250 MT/day depending on bag format. For landlocked buyers, 20 ft container lots from 24 MT suit rail and road onward distribution from regional hub ports.
Packaging & documentation
Standard export packaging: 25 kg bags, 40 bags per pallet, shrink-wrapped; big-bag option 1,000 kg with four-loop FIBC. Each lot ships with mill certificate of analysis covering Fe, S, insolubles and heavy-metal limits. SGS or equivalent pre-shipment inspection available on request.
Document set: commercial invoice, packing list, bill of lading, certificate of origin. Phytosanitary certificate issued where importing country requires it for fertilizer inputs. Payment: irrevocable LC at sight or CAD for first-time buyers; established accounts may negotiate open-account terms. Specify heptahydrate or monohydrate grade and bag format in your quote request.
FAQ
When should ferrous sulphate be used instead of chelated iron?
Ferrous sulphate is the economical choice for soil application and acid irrigation water where Fe²⁺ remains soluble at pH below 6.5. Switch to EDTA- or EDDHA-chelated iron when fertigating into alkaline water above pH 7.5 or when foliar correction must work on high-pH leaf surfaces — unchelated iron oxidises and precipitates within hours in those conditions.
What application rate corrects iron chlorosis in fruit orchards?
Broadcast 25–50 kg FeSO₄·7H₂O per hectare on calcareous soils at bud break, or inject 2–5 ppm Fe in drip lines during the first six weeks of vegetative growth. Foliar sprays at 0.5–1.0% concentration (5–10 g/L) green up interveinal chlorosis within 7–10 days on citrus, grape and stone fruit.
Does ferrous sulphate acidify alkaline irrigation water?
Yes — each tonne of ferrous sulphate dissolved in irrigation water releases sulphuric acid equivalents that lower bicarbonate alkalinity. At fertigation concentrations of 1–2 mmol/L Fe, pH typically drops 0.3–0.8 units, improving micronutrient availability alongside iron supply. Monitor final solution pH when combining with calcium nitrate or lime-stabilised water.
Related products
- NPK + Micronutrients — granular compounds with built-in Fe, Zn and B for field broadcast
- Calcium Nitrate — soluble Ca + N grade often paired with iron in greenhouse A/B tanks
- Water-soluble NPK — fertigation macronutrients compatible with iron injection programmes