I
AllChemicals — The Online Chemical Glossary | https://allchemicals.info/chemical/iron-iii-chloride
Quick Reference
| Formula / Notation | FeCl3 |
|---|---|
| CAS Number | 7705-08-0 |
| Molecular Weight | 162.20 |
| Melting Point | 583 °F (NTP, 1992) |
| Boiling Point | 599 °F at 760 mmHg (Decomposes) (NTP, 1992) |
| Density | 2.8 at 68 °F (anhydrous solid) (USCG, 1999) - Denser than water; will sink |
| Solubility | 5 to 10 mg/mL at 68 °F (NTP, 1992) |
| Appearance | Ferric chloride is an orange to brown-black solid. It is slightly soluble in water. It is noncombustible. When wet it is corrosive to aluminum and most metals. Pick up and remove spilled solid befo... |
| Also Known As | trichloroiron; FERRIC CHLORIDE; 7705-08-0; Iron trichloride; Iron chloride; Flores martis; Iron perchloride; Chlorure perrique; Perchlorure de fer; Iron chloride (FeCl3) |
| Category | Salts |
What is Iron(III) chloride?
Iron trichloride is an iron coordination entity. It has a role as a Lewis acid and an astringent.
Formula & Notation
FeCl3
IUPAC Name: trichloroiron
Other Names / Synonyms: trichloroiron; FERRIC CHLORIDE; 7705-08-0; Iron trichloride; Iron chloride; Flores martis; Iron perchloride; Chlorure perrique; Perchlorure de fer; Iron chloride (FeCl3)
Properties & Characteristics
Appearance: Ferric chloride is an orange to brown-black solid. It is slightly soluble in water. It is noncombustible. When wet it is corrosive to aluminum and most metals. Pick up and remove spilled solid befo.... Molecular formula: Cl3Fe. Molecular weight: 162.20 g/mol. Boiling point: 599 °F at 760 mmHg (Decomposes) (NTP, 1992). Melting point: 583 °F (NTP, 1992). Density: 2.8 at 68 °F (anhydrous solid) (USCG, 1999) - Denser than water; will sink. Solubility: 5 to 10 mg/mL at 68 °F (NTP, 1992). Vapor pressure: 1 mmHg at 381 °F (NTP, 1992).
Physical Data
| Property | Value |
|---|---|
| Melting Point | 583 °F (NTP, 1992) |
| Boiling Point | 599 °F at 760 mmHg (Decomposes) (NTP, 1992) |
| Density | 2.8 at 68 °F (anhydrous solid) (USCG, 1999) - Denser than water; will sink |
| Molecular Weight | 162.20 |
| Solubility | 5 to 10 mg/mL at 68 °F (NTP, 1992) |
| Appearance | Ferric chloride is an orange to brown-black solid. It is slightly soluble in water. It is noncombustible. When wet it is corrosive to aluminum and most metals. Pick up and remove spilled solid befo... |
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(III) chloride
Formula
FeCl3
CAS Number
7705-08-0
Molecular Weight
162.20
Category
Salts
Index
All "I" terms
Synonyms
trichloroiron; FERRIC CHLORIDE; 7705-08-0; Iron trichloride; Iron chloride; Flores martis; Iron perchloride; Chlorure perrique; Perchlorure de fer; Iron chloride (FeCl3)
Frequently Asked Questions
Iron trichloride is an iron coordination entity. It has a role as a Lewis acid and an astringent.
Used in food preservation, water treatment, chemical synthesis, fertilizers, and pharmaceutical applications.
Irritant or toxic depending on specific salt. Some salts are oxidising agents or toxic to aquatic environments. Consult SDS before use.
The formula or notation for Iron(III) chloride is: FeCl3
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Ideal Solution
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Ideal Solution
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Indicator
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Induced Dipole
Induced dipole: α × E (α = polarisability; E = electric field)
Inert Gas
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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.