---
title: "Ferrous Sulphate Heptahydrate (FeSO4·7H2O)"
description: "Ferrous sulphate heptahydrate (FeSO₄·7H₂O) is a water-soluble blue-green crystal with min. 19.7% Fe and low contaminants. Kemindo supplies it as a water…"
url: https://site.kemindogroup.com/en/products/ferrous-sulphate-heptahydrate
lang: en
lastmod: 2026-10-27T00:00:00.000Z
site: Kemindo Group
---

# Ferrous Sulphate Heptahydrate (FeSO4·7H2O)

Ferrous sulphate heptahydrate (FeSO₄·7H₂O) is a water-soluble blue-green crystal with min. 19.7% Fe and low contaminants. Kemindo supplies it as a water treatment coagulant, reducing agent, source of iron and for agriculture.

## Key facts

- Formula: FeSO4·7H2O
- Business lines: [Chemicals & Consumables](https://site.kemindogroup.com/en/business/chemicals)
- Categories: [Chemicals](https://site.kemindogroup.com/en/products/category/chemical)
- Industries: general-industry
- Availability: Available

Ferrous sulphate heptahydrate, also known as iron(II) sulphate heptahydrate, is a chemical compound with the formula FeSO₄·7H₂O. It is a hydrate, meaning it contains water molecules within its crystal structure. It appears as blue-green crystals or granules and is soluble in water. It is used in various applications, including as a reducing agent, a source of iron, in water treatment and in agriculture.

The advantages of our Ferrous Sulphate:

- Higher iron content and purity: higher Fe²⁺ content (min. 19%) means better coagulation efficiency.
- Low levels of contaminants such as heavy metals ensure safety in treated water.
- Better solubility and dissolution rate: a proper crystalline structure ensures rapid dissolution.
- Uniform particle size improves dosing accuracy and mixing.
- Lower impurity profile: lower levels of contaminants such as manganese, aluminium or chromium.

## Specifications

| Parameter | Value | Unit |
|---|---|---|
| Appearance | Blue–Green dry |  |
| FeSO₄·7H₂O | min 98.13 | % |
| Fe | min 19.7 | % |
| Sulphur (as S) percent by weight | min 10.5 |  |
| pH (1% solution) | not less than 3.5 |  |
| Moisture (% by weight) | max 1.5 |  |
| Titanium dioxide | max 0.25 |  |
| Free acid (HCl) | max 1 |  |
| As % | max 0.0004 |  |
| Pb % | max 0.002 |  |
| Cd % | max 0.0005 |  |

## Applications

- Reducing agent
- Source of iron
- Water treatment
- Agriculture

## Related products

- [Hydrated Lime](https://site.kemindogroup.com/en/products/hydrated-lime)
- [Quick Lime](https://site.kemindogroup.com/en/products/quick-lime-cao)
- [Copper Sulphate Pentahydrate](https://site.kemindogroup.com/en/products/copper-sulphate)

Request a quote: https://site.kemindogroup.com/en/contact?produk=ferrous-sulphate-heptahydrate