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HomeProduct name listCOBALT(III) FLUORIDE

COBALT(III) FLUORIDE

Synonym(s):Cobalt trifluoride;Cobaltic fluoride

  • CAS NO.:10026-18-3
  • Empirical Formula: CoF3
  • Molecular Weight: 115.93
  • MDL number: MFCD00010942
  • EINECS: 233-062-4
  • Update Date: 2024-08-28 13:53:22
COBALT(III) FLUORIDE Structural

What is COBALT(III) FLUORIDE?

Chemical properties

brown powder

Chemical properties

The heat of formation is —187 kcal mole-1 and the magnetic moment is 1-60 B.M. at 90°K rising to 2.46 B.M. at 293°K; it is thus a high spin compound but not magnetically dilute.
Anhydrous cobalt(III) fluoride turns dark in the presence of traces of water and reacts violently with the liquid-evolving oxygen. When heated in an inert atmosphere above 350°, cobalt(II) fluoride is formed. It reacts vigorously with many elements, e.g. Al, P, As, S, I, being reduced to cobalt(II) fluoride. It is insoluble in alcohol, ether and benzene and is a useful fluorinating agent in organic chemistry.

Physical properties

Light brown hexagonal crystal; density 3.88 g/cm3; moisture sensitive; stable in dry air; melts at 927°C; reacts with water.

The Uses of COBALT(III) FLUORIDE

Cobalt(III) fluoride is a powerful fluorinating agent.

The Uses of COBALT(III) FLUORIDE

Important fluorinating agent, particularly for complete fluorination of hydrocarbons by the Fowler process.

What are the applications of Application

Cobalt(III) fluoride is a powerful fluorinating agent

Preparation

Cobalt(III) fluoride may be prepared by reaction of elemental fluorine with cobalt(II) fluoride, cobalt(II) chloride or cobalt(III) oxide at 300 to 400°C.
2CoF2 + F2 → 2CoF3
2CoCl2 + 3F2 → 2CoF3 + 2Cl2
It should be stored in a sealed glass ampule, free from moisture.
Electrolytic oxidation of cobalt(II) fluoride in 40% hydrofluoric acid yields hydrated cobalt(III) fluoride, CoF3·3.5H2O (3.5 is the stoichiometric amount of water per CoF3 molecule in the crystal lattice).

Hazard

Strong irritant to tissue.

Structure and conformation

It forms hexagonal crystals of density 3.89, isomorphous with iron(III) and aluminium(III) fluorides, the cobalt atoms being octahedraily surrounded by fluorine atoms.

Properties of COBALT(III) FLUORIDE

Melting point: 927°C
Density  3.88 g/mL at 25 °C(lit.)
solubility  reacts with H2O; soluble in ethanol,ethyl ether, benzene
form  Powder
color  Light brown
Specific Gravity 3.88
Water Solubility  Insoluble in water.
Sensitive  Hygroscopic
Merck  14,2430
Exposure limits ACGIH: TWA 0.02 mg/m3; TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3
Stability: hygroscopic
CAS DataBase Reference 10026-18-3(CAS DataBase Reference)
EPA Substance Registry System Cobalt fluoride (CoF3) (10026-18-3)

Safety information for COBALT(III) FLUORIDE

Signal word Danger
Pictogram(s)
ghs
Corrosion
Corrosives
GHS05
GHS Hazard Statements H314:Skin corrosion/irritation
Precautionary Statement Codes P260:Do not breathe dust/fume/gas/mist/vapours/spray.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P363:Wash contaminated clothing before reuse.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for COBALT(III) FLUORIDE

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