I

Iron(II) chloride

IUPAC: dichloroiron

FeCl2 Salts CAS 7758-94-3
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Quick Reference
Formula / NotationFeCl2
CAS Number7758-94-3
Molecular Weight126.75
Melting Point[ACGIH] 674 °C
Boiling Point1023 °C
Density1.93 at 68 °F (USCG, 1999) - Denser than water; will sink
SolubilityFREELY SOL IN WATER, ALCOHOL ACETONE; SLIGHTLY SOL IN BENZENE; PRACTICALLY INSOL IN ETHER.
AppearanceFerrous chloride is a greenish white crystalline solid. It is soluble in water. It is noncombustible. It is used in sewage treatment, in dyeing of fabrics, and for many other uses.
Also Known Asdichloroiron; Iron dichloride; FeCl2; Ferrous dichloride; Iron(2+) chloride; Ferro 66; Iron protochloride; Natural lawrencite; Iron chloride (FeCl2); Iron(II) chloride (1:2)
CategorySalts

What is Iron(II) chloride?

Iron(II) chloride (FeCl2) is a salt that appears as Ferrous chloride is a greenish white crystalline solid. It is soluble in water. It is noncombustible. It is used in sewage treatment, in dyeing of fabrics, and for many other uses.. It has a molecular weight of 126.75 g/mol. Its IUPAC name is dichloroiron. Boiling point: 1023 °C. Melting point: [ACGIH] 674 °C.

Formula & Notation

FeCl2

IUPAC Name: dichloroiron

Other Names / Synonyms: dichloroiron; Iron dichloride; FeCl2; Ferrous dichloride; Iron(2+) chloride; Ferro 66; Iron protochloride; Natural lawrencite; Iron chloride (FeCl2); Iron(II) chloride (1:2)

Properties & Characteristics

Appearance: Ferrous chloride is a greenish white crystalline solid. It is soluble in water. It is noncombustible. It is used in sewage treatment, in dyeing of fabrics, and for many other uses.. Molecular formula: Cl2Fe. Molecular weight: 126.75 g/mol. Boiling point: 1023 °C. Melting point: [ACGIH] 674 °C. Density: 1.93 at 68 °F (USCG, 1999) - Denser than water; will sink. Solubility: FREELY SOL IN WATER, ALCOHOL ACETONE; SLIGHTLY SOL IN BENZENE; PRACTICALLY INSOL IN ETHER.. Vapor pressure: 10 MM HG @ 700 °C.

Physical Data

PropertyValue
Melting Point[ACGIH] 674 °C
Boiling Point1023 °C
Density1.93 at 68 °F (USCG, 1999) - Denser than water; will sink
Molecular Weight126.75
SolubilityFREELY SOL IN WATER, ALCOHOL ACETONE; SLIGHTLY SOL IN BENZENE; PRACTICALLY INSOL IN ETHER.
AppearanceFerrous chloride is a greenish white crystalline solid. It is soluble in water. It is noncombustible. It is used in sewage treatment, in dyeing of fabrics, and for many other uses.

Uses & Applications

Used in food preservation, water treatment, chemical synthesis, fertilizers, and pharmaceutical applications.

Safety Information

Irritant or toxic depending on specific salt. Some salts are oxidising agents or toxic to aquatic environments. Consult SDS before use.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Iron(II) chloride
Formula FeCl2
CAS Number 7758-94-3
Molecular Weight 126.75
Category Salts
Synonyms dichloroiron; Iron dichloride; FeCl2; Ferrous dichloride; Iron(2+) chloride; Ferro 66; Iron protochloride; Natural lawrencite; Iron chloride (FeCl2); Iron(II) chloride (1:2)

Frequently Asked Questions

Iron(II) chloride (FeCl2) is a salt that appears as Ferrous chloride is a greenish white crystalline solid. It is soluble in water. It is noncombustible. It is used in sewage treatment, in dyeing of fabrics, and for many other uses.. It has a molecular weight of 126.75 g/mol. Its IUPAC name is dichloroiron. Boiling point: 1023 °C. Melting point: [ACGIH] 674 °C.

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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.