FeCl2 & FeCl3: Which to Choose for Your Plant? Comparison & Pricing
Tóm tắt nội dung
- FeCl2 & FeCl3 — Core Differences
- When to Choose FeCl2?
- When to Choose FeCl3?
- Treatment Cost Comparison: FeCl2 vs FeCl3 vs PAC
- Loc Thien's FeCl2 & FeCl3 Specifications
- Usage & Safety Guidelines
- FeCl2 & FeCl3 Pricing — Direct Manufacturing, Competitive Rates
- Frequently Asked Questions
- What's the difference between FeCl2 and FeCl3?
- Can FeCl2 and FeCl3 be used interchangeably?
- Do ferric/ferrous chlorides require special purchase permits?
- How long can FeCl2/FeCl3 be stored?
- What are the delivery methods?
- Can we trial FeCl2/FeCl3 before long-term contracts?
- How quickly can I get pricing?
5 Key Takeaways:
- Fe²⁺ (FeCl2) reduces Cr⁶⁺/CN⁻ — irreplaceable by FeCl3 or PAC for electroplating/textile wastewater
- Fe³⁺ (FeCl3) forms dense, fast-settling flocs — superior coagulation for municipal wastewater and raw water
- Loc Thien direct manufacturing — no middlemen — batch-specific COA/MSDS, factory pricing
- 20 tankers (5-30 tons) + 6 nationwide warehouses — 4-hour delivery in HCMC, 24 hours to Southern IPs
- 15-minute pricing via hotline 0979 891 929 — includes jar testing support for chemical selection
FeCl2 & FeCl3 — Core Differences
FeCl2 contains iron(II) ions (Fe²⁺) while FeCl3 contains iron(III) ions (Fe³⁺) — this valence difference dictates the entire coagulation mechanism. FeCl2 solution appears pale green, typically used for electroplating, textile dyeing, and hexavalent chromium (Cr⁶⁺) treatment due to its reducing properties. FeCl3 appears reddish-brown, forming heavy coagulant flocs with rapid settling, highly effective for municipal wastewater, raw water, and PCB etching. Direct comparison below.
| Parameter | FeCl2 (Ferrous chloride) | FeCl3 (Ferric chloride) |
|---|---|---|
| CAS | 7758-94-3 | 7705-08-0 |
| Iron ion | Fe²⁺ (Ferrous) | Fe³⁺ (Ferric) |
| Solution color | Pale green | Reddish-brown |
| Commercial form | 28-30% solution, FeCl2·4H2O crystals | 40-42% solution, FeCl3·6H2O crystals |
| Native pH | <1.0 | <1.0 |
| Treatment mechanism | Reduces Cr⁶⁺→Cr³⁺, coagulation | Coagulation, heavy floc formation |
| Primary applications | Electroplating, textiles, CN⁻/Cr⁶⁺ treatment | Municipal wastewater, raw water, PCB etching |
When to Choose FeCl2?
Select FeCl2 for electroplating or textile wastewater — industries generating hexavalent chromium (Cr⁶⁺) and cyanide (CN⁻), toxic agents requiring reduction before coagulation. Fe²⁺ acts as a reducing agent: converting toxic Cr⁶⁺ to less toxic Cr³⁺, then precipitating as Cr(OH)₃ at pH 8-9. An electroplating plant in Bien Hoa II IP switching from NaHSO₃ to 28-30% FeCl2 solution reported ~15% sludge reduction and eliminated a separate chromium treatment step.
When to Choose FeCl3?
Choose FeCl3 when rapid coagulation, dense floc formation, and good settling across wide pH ranges are needed — typical for municipal WWTPs, food wastewater, and raw water systems. Fe³⁺ hydrolysis produces Fe(OH)₃ flocs with large surface area, adsorbing suspended solids, phosphates, and heavy metals at pH 5-9. FeCl3 is also standard for PCB etching — controlled copper corrosion ensuring circuit precision. For plants requiring phosphate removal meeting QCVN 40:2011/BTNMT standards, FeCl3 outperforms PAC at equivalent dosages.
Treatment Cost Comparison: FeCl2 vs FeCl3 vs PAC
Per m³ treatment costs include not just chemical prices — but also neutralizing alkali, flocculation aids, and sludge handling. While FeCl3 per-ton costs exceed PAC, its dense flocs reduce clarifier retention time and polymer demand — often yielding comparable or lower total OPEX. FeCl2 serves the unique Cr⁶⁺/CN⁻ reduction role where PAC/FeCl3 cannot substitute, requiring case-specific cost calculations.
| Criterion | FeCl2 | FeCl3 | PAC |
|---|---|---|---|
| Primary role | Cr⁶⁺/CN⁻ reduction + coagulation | Coagulation, phosphate removal | Coagulation |
| Effective pH range | 8-9 (post-reduction) | 5-9 | 5.5-7.5 |
| Floc characteristics | Medium | Dense, fast-settling | Light, requires polymer |
| Per m³ treatment cost | Plant-dependent | Plant-dependent | Plant-dependent |
| Needs alkali neutralization | Yes | Yes | Less |
Loc Thien's FeCl2 & FeCl3 Specifications
Loc Thien has directly manufactured FeCl2 and FeCl3 in Vietnam since 2016, with quality control from raw materials to finished products. Each batch includes CO (Certificate of Origin), CQ (Quality Certificate), CoA (Analysis Certificate), and MSDS — meeting ISO 14001 audit requirements.
| Parameter | FeCl2 (Solution) | FeCl3 (Solution) |
|---|---|---|
| Active content | FeCl2 ≥28-30% | FeCl3 40-42% |
| Ferric impurity | Fe³⁺ ≤0.5% | — |
| Density (20°C) | 1.30-1.35 g/ml | 1.42-1.45 g/ml |
| Native pH | <1.0 | <1.0 |
| Available forms | Solution, FeCl2·4H2O crystals | Solution, FeCl3·6H2O crystals |
| Packaging | IBC 1000L, 5-30 ton tankers | IBC 1000L, 5-30 ton tankers |
Usage & Safety Guidelines
Both FeCl2 and FeCl3 have native pH <1.0 — highly corrosive to carbon steel, aluminum, and 304 stainless. Storage requires FRP, HDPE, or PP tanks; piping should be PVC/CPVC or HDPE. Operators must wear rubber gloves, goggles, and acid vapor masks. Store in dry, ventilated areas away from sunlight and temperatures above 40°C. For spills: isolate area, neutralize with Na₂CO₃ or Ca(OH)₂ to pH 7-8, absorb with inert material, and dispose as hazardous waste.
FeCl2 & FeCl3 Pricing — Direct Manufacturing, Competitive Rates
Loc Thien directly manufactures both FeCl2 and FeCl3 — no intermediaries, transparent batch-specific COA/MSDS at factory prices. Six warehouses nationwide (HCMC, Dong Nai, BR-VT, Can Tho, Da Nang, Bac Ninh) minimize delivery distances; 20 owned tankers (5-30 tons) enable direct pumping. Download TDS or call 0979 891 929 for concentration/volume-specific quotes — response within 15 minutes.
Related FeCl2/FeCl3 Articles:
- FeCl2 Wastewater Treatment: Dosage, Applications & Pricing — detailed dosage table by wastewater type, Jar testing protocol, Cr⁶⁺ reduction guide
- FeCl2 Supply: Color, Specifications & Water Treatment Applications — FeCl2 physical properties, packaging options, nationwide delivery
- FeCl3 — Full Technical Guide: Properties & Applications — CAS 7705-08-0 specifications, coagulation performance vs PAC
- FeCl3 in Wastewater Treatment: Dosage & Applications — ferric chloride dosing for municipal and industrial WWTPs
Frequently Asked Questions
📖 Related Guides:
What's the difference between FeCl2 and FeCl3?
The core difference lies in iron valence: FeCl2 contains Fe²⁺ (ferrous), FeCl3 contains Fe³⁺ (ferric). Fe²⁺ acts as a reducing agent — used to treat Cr⁶⁺ and CN⁻ in electroplating/textile wastewater. Fe³⁺ forms heavier, faster-settling flocs — used for municipal wastewater, raw water, and PCB etching.
Can FeCl2 and FeCl3 be used interchangeably?
Not entirely. For general coagulation, FeCl3 outperforms due to dense flocs and wider pH range. But wastewater containing Cr⁶⁺ or CN⁻ requires FeCl2 (or other reducers) first — FeCl3 cannot reduce these. Loc Thien engineers provide jar testing to determine optimal chemicals.
Do ferric/ferrous chlorides require special purchase permits?
Not controlled substances in Vietnam. Corporate buyers need business licenses and chemical handling certifications if applicable. Delivery documents include VAT invoices, CO, CQ, CoA, MSDS, and delivery notes — sufficient for environmental audits.
How long can FeCl2/FeCl3 be stored?
FeCl2 solution: 3-6 months in FRP/HDPE sealed tanks; FeCl2 crystals: 12 months in dry, sealed bags. FeCl3 solution: 6-12 months in sealed tanks below 40°C. Both degrade if exposed to air long-term through oxidation/hydrolysis.
What are the delivery methods?
Loc Thien delivers via 20 dedicated tankers (5-30 tons), pumping directly into client tanks — no transfers, no losses. Smaller orders via IBC 1000L. Delivery times: 4 hours in HCMC, 24 hours to Southern IPs, 48-72 hours to Central/Northern regions from 6 nationwide warehouses.
Can we trial FeCl2/FeCl3 before long-term contracts?
Yes. Loc Thien supports trial orders from 300kg for both solutions, with batch-specific COA/MSDS and technical consultation. Plants conduct jar tests to confirm real wastewater performance before bulk purchases or framework agreements.
How quickly can I get pricing?
Loc Thien’s sales team provides preliminary quotes within 15 minutes via 0979 891 929, including TDS. Formal quotes based on actual volumes are emailed/PDFed immediately after confirming concentration, quantity, and delivery location.
Request Pricing
Evaluating FeCl2/FeCl3 for your wastewater system? Verify Loc Thien’s capabilities:
- Call 0979 891 929 — receive quotes within 15 minutes with current batch COA
- Factory audit — verify direct FeCl2/FeCl3 production capacity before contracts
- Trial order — experience full process from quoting → batch-specific COA/MSDS → delivery before long-term commitments
Verifiable Operational Capacity:
- 20 owned tankers (5-30 tons) — no subcontractors. License plates provided during audits
- 6 nationwide warehouses: HCMC, Dong Nai, Bac Ninh, Da Nang, Can Tho, BR-VT — specific addresses available
- Batch-specific COA/MSDS — 100% documentation compliance with ISO 9001/14001
- Direct Vietnam production since 2016 — transparent CO/CQ/CoA with batch traceability
- 400+ active plant clients — from Amata, VSIP, Long Hau to DEEP C, Tra Noc IPs
LOC THIEN INVESTMENT DEVELOPMENT CO., LTD
Tax ID: 0313650856 Hotline: 0979 891 929 Website: hoachatlocthien.com
See Also: