What is Ferrous Sulfate (FeCl2)?
Ferrous sulfate (FeCl₂ — Iron(II) Chloride, CAS: 7758-94-3) FeCl₂ is an inorganic compound with strong coagulating and reducing properties, widely used in the treatment of industrial wastewater, electroplating, textile dyeing, and livestock farming. In a 15-30% solution, FeCl₂ is a clear, pale blue substance with a molecular weight of 126,75 g/mol. It is one of the essential chemicals that helps businesses meet the QCVN 40:2025/BTNMT wastewater discharge standards at optimal cost.
FeCl₂ Technical Specifications
| Parameter | Value |
|---|---|
| Formula | FeCl₂ |
| CAS number | 7758-94-3 |
| Molecular mass | 126,75 g / mol |
| Common concentrations | 15% - 30% |
| Optimal pH | 5-8 |
| Pack | 30kg can, 200kg drum, 1-ton tank, tanker truck |
| Certificate | MSDS, COA, ZDHC |
7 Main Applications in Industry
- Wastewater treatmentRemoves heavy metals (Cr, Ni, Cu, Zn), phosphorus, and reduces BOD/COD.
- H₂S removal: Fe²⁺ + H₂S → FeS↓ — effective odor treatment
- Electroplating: Recovery of Cr⁶⁺, Ni²⁺ by coagulation + precipitation
- Textile Dyeing (ZDHC): Dye coagulation, meeting ZDHC standards
- Livestock / AquaculturePond water treatment, algae control
- Chemical production: Catalysis, preparation of iron salts
- landfillTreatment of high COD leachate
Compare FeCl₂ vs FeCl₃ vs PAC
| Criteria | FeCl₂ | FeCl₃ | CAP |
|---|---|---|---|
| Heavy metals | ★ ★ ★ ★ ★ | ★ ★ ★ ★ | ★★★ |
| H₂S removal | ★ ★ ★ ★ ★ | ★★ | ★ |
| General Coagulation | ★★★ | ★ ★ ★ ★ ★ | ★ ★ ★ ★ |
| pH has an effect. | Low (pH 5-8) | Many (pH 2-4) | Medium |
Why Choose Ferrous Sulfate FeCl₂ from Loc Thien?
- ✅ Over 10 years of experience supplying industrial chemicals
- ✅ The product meets ZDHC standards and has complete MSDS and COA.
- ✅ 6 warehouses: Ho Chi Minh City, Binh Duong, Dong Nai, Da Nang, Can Tho
- ✅ Fast nationwide delivery using specialized tanker trucks.
- ✅ 24/7 Technical Support: (+84)979 891929
Top Q&A
What is ferric sulfate (FeCl2) and what is it used for?
Ferrous sulfate (FeCl₂, Iron(II) Chloride, CAS: 7758-94-3) is a coagulant used in industrial wastewater treatment. FeCl₂ is particularly effective in removing heavy metals (Cr, Ni, Cu), eliminating odor-causing H₂S, and removing phosphorus. Common dosages range from 100-500 mg/L depending on the type of wastewater.
Where can I buy reliable ferrous sulfate (FeCl2)?
Loc Thien is a leading distributor of ferric sulfate (FeCl₂) in Vietnam, offering products that meet ZDHC standards and have complete MSDS documentation. We have a nationwide network of 6 warehouses. Contact our hotline at (+84)979 891929 for the best price quote.
What is the difference between FeCl2 and FeCl3?
FeCl₂ (iron II) is more effective at reducing H₂S and removing heavy metals, with an optimal pH of 5-8. FeCl₃ (iron III) is more effective at general coagulation and water treatment, with an optimal pH of 2-4. FeCl₂ should be used for electroplating wastewater, while FeCl₃ or PAC should be used for domestic wastewater.
How much does ferric sulfate (FeCl2) cost?
FeCl₂ prices depend on concentration (15-30%), quantity, and time of year. Loc Thien commits to competitive prices and nationwide delivery by tanker truck. Contact (+84)979 891929 or email locthien@locthien.vn to receive the latest wholesale price list.
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Updated: 01/04/2026
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