FeCl2 production (iron(II) chloride / ferrous depressionCAS 7758-94-3) main industries according to Fe + 2HCl → FeCl2 + H₂Alternatively, reduce FeCl3 with metallic iron. Commonly available commercial solutions include: 15-30%Used in wastewater treatment, disinfection, electroplating, etc. Loc Thien supplies FeCl2 with COA/MSDS.
You need to understand Methods for producing/preparing FeCl2 Before purchasing or operating? Below are lab and industry guidelines (technical summaries), specifications, safety, and FAQs — not a substitute for licensed factory SOPs.
3 key points to remember:
- Most popular: Iron metal + HCl acid (hydrogen gas is produced — safety is important).
- Industry: Adding filtration, adjusting concentration, packaging, COA — it's not just "one reaction vessel".
- B2B purchases: Liquid FeCl2 15–30% when they do not yet have the capacity to produce it themselves.
| Category | Quick information |
|---|---|
| Name / alias | FeCl2, iron(II) chloride, ferrous chloride, FECL2 |
| CAS | 7758-94-3 |
| Background reaction | Fe + 2HCl → FeCl2 + H2↑ |
| Commercial concentration (for reference) | ~15–30% (based on the correct COA of the shipment) |
| Type / color | The solution is pale green when fresh; it darkens when oxidized. |
| Pack | Can / drum / IBC / tank |
| Document | COA, MSDS/SDS |
What is FeCl2 (in the context of manufacturing)?
FeCl2 It is an iron(II)–chloride salt, soluble in water. In production, the goal is to obtain a stable Fe²⁺ solution, limit oxidation to Fe³⁺ (FeCl3), and achieve the percentage and impurities according to the COA.
Details on "what it is / applications": see related FeCl articles on the site; this article focuses on... How to make FeCl2.
Methods for producing and preparing FeCl2
1) Iron metal + hydrochloric acid (HCl) — the most common
Equation:
Fe + 2HCl → FeCl2 + H2↑
- Prepare clean iron and HCl according to process concentrations; corrosion protection equipment; ventilation/gas recovery.
- When iron reacts with HCl: a slight exothermic reaction occurs, producing hydrogen. No open flames, no sparks..
- Filter out excess iron/precipitate; adjust FeCl2 concentration (commercial frameworks are typically 15–30%).
- Seal the packaging tightly to limit air exposure and slow the oxidation of Fe²⁺ → Fe³⁺.
Small Lab Use the above principle to understand the reaction; factory Additional control measures include impurity control, H₂ treatment, and batch QC.
2) Reduce FeCl3 to FeCl2
Common industrial approaches when FeCl3 is in excess/recycled:
Common equations: 2FeCl3 + Fe → 3FeCl2
Some documents mention dehydrogenation using gaseous hydrogen — a more stringent technical requirement; in practice, safety and efficiency assessments are necessary. After dehydrogenation: filtration, percentage adjustment, and sealed storage.
| Criteria | Lab / small-scale preparation | Industrial production |
|---|---|---|
| Target | Understanding the reaction | % stability, COA, delivery |
| Safe | Fume hood, PPE | Gas treatment, chemical storage |
| Contamination control | Limit | Spec by batch |
| When to buy from outside | Lack of equipment | Insufficient permits/production line; requires stable volume. |
3) Other (less commonly used) directions
Electrolysis or some metal salting processes can be studied, but are less common than Fe + HCl / reduction of FeCl3 in the practical supply of industrial liquid FeCl2 in Vietnam.
Specifications & Packaging (for reference)
- Formula: FeCl2 or hydrated form (e.g., FeCl2·4H2O) — refer to COA.
- State: liquid solution, pale green when fresh.
- Characteristic: Easily oxidizes to FeCl3 if left exposed for a long time.
- Packaging: cans, drums, IBCs, tanks as per order.
Main applications of FeCl2 after production
- Treatment of industrial/livestock wastewater / some pond/lake systems (according to dosage and standards).
- Removal/assistance to the removal of impurities in electroplating and related Fe²⁺ processes.
- Intermediate or transitional stage in the chemical chain (including the FeCl3 direction).
Choosing FeCl2 vs FeCl3: no 1:1 substitution — jar test on real water. Technical grade FeCl3 solid product: 96% solid FeCl3.
Storage, transportation, and safety
- Acid-resistant PPE; batch-specific MSDS.
- Seal tightly, restrict oxygen; store compatible materials.
- H₂ in the Fe + HCl process: fire and explosion control / ventilation.
- Do not discharge directly into the environment; comply with industrial park limits/applicable regulations.
Frequently Asked Questions about FeCl2 Production
What is the most common method for producing FeCl2?
Iron metal reacts with HCl: Fe + 2HCl → FeCl2 + H2↑. This is also the basis of many industrial processes that combine filtration and concentration adjustment.
What is the CAS number for FeCl2?
CAS 7758-94-3 (ferrous chloride / iron II chloride).
How does industrially produced FeCl2 differ from laboratory-produced FeCl2?
The lab focuses on reaction and observation. Production involves further control of raw materials, hydrogen gas, purification, percentage according to COA, packaging, and quality records.
Is it possible to make FeCl2 from FeCl3?
Yes — reduce FeCl3 (usually with metallic iron: 2FeCl3 + Fe → 3FeCl2), then filter and adjust the concentration; store in a sealed container to limit re-oxidation.
What is the commercial concentration of FeCl2?
Commonly around 15-30% It depends on the supplier and the batch COA. You should use the exact percentage printed on the COA, not rely on the general description.
Should we buy 15–30% FeCl2 instead of producing it ourselves?
When licenses, equipment, and QC are not yet available, it is advisable to purchase commercially available FeCl2. See FeCl2 15–30% at Loc Thien Chemicals / HCB — Quotations are provided upon request, and COA/MSDS is available per batch.
Why choose FeCl2 from Loc Thien?
- B2B orientation: quality of batch and documentation, not "cheap at all costs".
- Commercial concentration, delivered by order (can/IBC/tank as agreed).
- Basic technical support is provided based on water treatment/industrial usage needs.
See FeCl2 15–30% — specifications & contact for pricing.
Recycled FeCl2 & ESG Benefits: The acid immersion of steel/scrap iron/FeCl₃ reduction and its business-environmental benefits are discussed in detail on Loc Thien's main page: What is recycled FeCl2? Buy FeCl2 15–30% COA: Iron(II) chloride Loc Thien Hotline: (+84) 979 891 929.
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