- Ferrous sulfate heptahydrate is a fundamental iron source in blue-green crystal form, containing a minimum of 19% iron.
- It is completely water-soluble and contains at least 19% Fe (Iron).
- In agriculture, it is commonly used as a fertilizer in cases where iron deficiency inhibits growth in plants. It contributes to the increase of chlorophyll pigments, thereby helping to grow healthy products.
- Ferrous sulfate heptahydrate, which is frequently used in industrial applications, is used as a flocculant in water treatment plants and as a chromium reducer in the cement industry.
- Chromium is an undesirable element in cement that can cause allergic reactions and dermatitis. Depending on concentration and exposure duration, hexavalent chromium (Cr6+) in cement can penetrate human skin, causing an allergy called chromate dermatitis, and has also been classified as carcinogenic. To protect human health and the environment, chromium in cement must be reduced.
- Ferrous sulfate heptahydrate can be applied in the cement industry during clinker grinding processes with a drying agent in crystal form.
FERROUS SULFATE HEPTAHYDRATE PRODUCT ANALYSES
| TESTS | LIMITS |
|---|---|
| Appearance | Blue green crystal |
| pH (5% solution) | 2 – 4 |
| FeSO4 | 51 – 53% |
| Water Soluble Iron (Fe) | min. 19% |

