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Ferric Chloride (Iron(III) Chloride)

FeCl3
CAS 7705-08-0 · Formula Cl3Fe · MW 162.20 g/mol

A workhorse iron(III) coagulant and etchant relied on across water treatment and electronics manufacturing. It is widely used for sewage and industrial wastewater treatment, as an etchant for engraving and printed circuitry, as a mordant, and as a catalyst, oxidizing and chlorinating agent.

Part of Inorganic Coagulants · Process Water Treatment (Mining)
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UN Number
UN 1773
Hazard Class
Class 8
HS Code
2827.39
At a Glance
Material Family
Acids & Salts
Record Type
Pure compound
Primary Role
Chelation / Sequestration · Coagulation / Flocculation
Solubility
5 to 10 mg/mL at 20 °C
Functional Roles
Chelation / Sequestration Coagulation / Flocculation
INCI Name
FERRIC CHLORIDE
CosIng Functions
ASTRINGENT
Industries Served
Beauty & Personal Care Oil & Gas Water Treatment
Applications & Use Cases
  • ▸ Water treatment: coagulant and flocculant for sewage and industrial wastewater
  • ▸ Etching: etchant for engraving, photoengraving and printed circuit boards
  • ▸ Catalysis: Lewis-acid catalyst and chlorinating/oxidizing agent
  • ▸ Textiles: mordant in dyeing and finishing
Physical Properties
Melting Point
306 °C
Boiling Point
315 °C at 760 mmHg (Decomposes)
Density
2.8 at 20 °C (anhydrous solid)
Solubility
5 to 10 mg/mL at 20 °C
Vapor Pressure
1 mmHg at 194 °C
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

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DOT / UN Transport Classification
DOT hazard class 8 placard
UN / DOT NumberUN 1773
Hazard Class / DivisionClass 8
Packing GroupIII
Proper Shipping NameFerric chloride, anhydrous

Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.

HS / Tariff Classification
Harmonized System (HS) Code — 6-digit international heading
2827 . 39
Chapter 28
Inorganic chemicals; compounds of precious metals and rare-earth metals
Heading 28.27
Internationally harmonized (WCO HS)
Subheading 2827.39
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
7705-08-0
Molecular Formula
Cl3Fe
Molecular Weight
162.20 g/mol
IUPAC Name
trichloroiron
INCI Name
FERRIC CHLORIDE
PubChem CID
24380
InChI Key
RBTARNINKXHZNM-UHFFFAOYSA-K
Synonyms & Trade Names
FERRIC CHLORIDE Iron trichloride Iron chloride Flores martis Iron perchloride Chlorure perrique Perchlorure de fer Iron chloride (FeCl3) Natural molysite FERRIC CHLORIDE, ANHYDROUS Chlorure ferrique Iron sesquichloride (DOT) Iron sesquichloride FeCl3 Ferric trichloride
Full Description

Ferric chloride (iron(III) chloride, CAS 7705-08-0) is an inorganic iron salt supplied in solid and solution grades. It is widely used for sewage and industrial wastewater treatment, as an etchant for engraving and printed circuitry, as a mordant, and as a catalyst, oxidizing and chlorinating agent.

Frequently Asked Questions

What is ferric chloride used for?

Ferric chloride (iron(III) chloride, CAS 7705-08-0) is used as a coagulant and flocculant in sewage and industrial wastewater treatment, as an etchant for engraving and printed circuit boards, as a Lewis-acid catalyst and chlorinating/oxidizing agent, and as a textile mordant. Water treatment and etching are the highest-volume applications.

Is ferric chloride supplied as a solution or a solid?

Both. We supply solid (anhydrous/hexahydrate) and aqueous solution grades; solution grades are common for water-treatment dosing. Specify concentration and grade on your RFQ.

What concentration is ferric chloride etching solution?

Etching grades are supplied as aqueous solutions; the working concentration depends on the substrate and process. State your target Baume/concentration and intended substrate on the RFQ so we can match the correct grade.

What is the cost of bulk ferric chloride?

Pricing depends on grade (solid vs solution), concentration, and packaging (drums, totes, or bulk). Request a bulk quote with your volume and delivery point for current pricing.

What are the UN number and HS code for shipping ferric chloride?

Ferric chloride ships under UN 1773. The HS classification is 2827.39. A current SDS with full transport and handling information is provided with each shipment.

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Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.
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