ChemicalBook Product Catalog Inorganic chemistry Inorganic salts Metal halide and Halogen salt Metal fluoride and salt Cobalt(II) fluoride

Cobalt(II) fluoride

Product NameCobalt(II) fluoride
CAS10026-17-2
MFCoF2
MW96.93
EINECS233-061-9
MOL File10026-17-2.mol

Chemical Properties

Melting point

1200 °C

Boiling point

1400 °C

Density

4.46 g/mL at 25 °C

solubility

soluble in acid solutions

form

powder

Specific Gravity

4.46

color

Pink

Water Solubility

Soluble in water, alcohol and acetone.

Specific Heat Capacity

Cp(crystal): 0.71 J/(g·K), at 25℃

Sensitive

Hygroscopic

Crystal Structure

Rutile type

crystal system

square

Merck

14,2440

Space group

P42/mnm

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.4695	0.4695	0.3182	90	90	90	0.0701

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

Major Application

battery manufacturing

Safety Information

Hazard Codes	T,C
Risk Statements	25-34
Safety Statements	26-36/37/39-45-50A-28A
RIDADR	UN 2923 8/PG 3
WGK Germany	3
RTECS	GG0770000
F	21
Hazard Note	Toxic
TSCA	TSCA listed
HazardClass	6.1
PackingGroup	III
HS Code	28261990
Storage Class	6.1A - Combustible acute toxic Cat. 1 and 2 very toxic hazardous materials
Hazard Classifications	Acute Tox. 3 Oral Skin Corr. 1B
Hazardous Substances Data	10026-17-2(Hazardous Substances Data)

MSDS

Provider	Language
Cobalt difluoride	English
SigmaAldrich	English
ACROS	English
ALFA	English

Usage And Synthesis

Preparation

Cobalt(II) fluoride is prepared by heating anhydrous cobalt(II) chloride or oxide in a stream of hydrogen fluoride:
CoCl2 + 2HF → CoF2 + 2HCl
CoO + 2HF → CoF2 + 2H2O
Also, cobalt(II) fluoride can be prepared as a tetrahydrate, CoF2•4H2O by dissolving cobalt(II) hydroxide in hydrofluoric acid. The tetrahydrate is then dehydrated to anhydrous fluoride. Elemental fluorine combines with cobalt at 450°C forming mixtures of cobalt(II)–and cobalt(III) fluorides.

Chemical Properties

Rose-red crystals or powder. Soluble in cold water and hydrofluoric acid. Decomposes in hot water. Ammine complexes can be prepared from the hydrate.

Physical properties

Red tetragonal crystal; density 4.46 g/cm³; melts at 1,127°C; vaporizes around 1,400°C; sparingly soluble in water; soluble in warm mineral acids; decomposes in boiling water. Tetrahydrate is red orthogonal crystal; density 2.22 g/cm³; decomposes on heating; soluble in water; di- and trihydrates are soluble in water.

Uses

Cobalt(II) fluoride can be used as a catalyst to alloy metals. It is also used for optical deposition, of which it tremendously improves optical quality. The compound may be used in dental care.

Uses

Catalyst for organic reactions.

General Description

Violet to red solid. Sinks and mixes slowly with water.

Reactivity Profile

Cobalt(II) fluoride is a toxic, light brown crystalline material, when exposed to water Cobalt(II) fluoride forms highly corrosive hydrofluoric acid. When heated to decomposition Cobalt(II) fluoride emits toxic fumes of metallic cobalt and fluorides [Lewis, 3rd ed., 1993, p. 344].

Hazard

Highly toxic.

Health Hazard

INHALATION: Inhalation of dust may cause pulmonary symptoms. EYES: Irritation. SKIN: Skin rashes, dermatitis. INGESTION: Nausea and vomiting caused by local irritation.
LD50 oral (rat): 150 mg/kg

Safety Profile

Poison by ingestion. When heated to decomposition it emits toxic fumes of Co and F-.

Cobalt(II) fluoride

Chemical Properties

Safety Information

MSDS

Usage And Synthesis

Preparation Products And Raw materials

Cobalt(II) fluoride Supplier

Cobalt(II) fluoride manufacturers

Related Product Information