COBALT(II) FLUORIDE TETRAHYDRATE

COBALT(II) FLUORIDE TETRAHYDRATE Property

Melting point:

200°C

Boiling point:

decomposes [MER06]

Density 

2.19 g/mL at 25 °C(lit.)

solubility 

water: solubleslightly

form 

Powder

color 

Pink

Specific Gravity

2.19

Water Solubility 

soluble H2O [MER06]

Sensitive 

Moisture Sensitive

Merck 

14,2440

Exposure limits

ACGIH: TWA 0.02 mg/m3

Major Application

(Catalyst)

InChI

1S/Co.2FH.4H2O/h;2*1H;4*1H2/q+2;;;;;;/p-2

InChIKey

MNHUTFNEBYCZAF-UHFFFAOYSA-L

SMILES

O.O.O.O.F[Co]F

CAS DataBase Reference

13817-37-3(CAS DataBase Reference)

Safety

Hazard Codes 

T

Risk Statements 

23/24/25-32-34

Safety Statements 

26-27-28-36/37/39-45

RIDADR 

UN 2923 8/PG 3

WGK Germany 

3

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

III

Storage Class

6.1C - Combustible acute toxic Cat.3
toxic compounds or compounds which causing chronic effects

Hazard Classifications

Acute Tox. 3 Dermal
Acute Tox. 3 Inhalation
Acute Tox. 3 Oral
Eye Dam. 1
Skin Corr. 1B

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H301Toxic if swalloed

H314Causes severe skin burns and eye damage

H317May cause an allergic skin reaction

H318Causes serious eye damage

H351Suspected of causing cancer

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

COBALT(II) FLUORIDE TETRAHYDRATE Chemical Properties,Usage,Production

Chemical Properties

Rose red crystal

Uses

Cobalt(II) fluoride tetrahydrate is used as a starting material to synthesize 2-dimensional cobalt-fluoride-oxide as an oxygen evolution electrocatalysts using a rapid thermal annealing (RTA) method. In this process, the cobalt(II) fluoride tetrahydrate is placed in an alumina furnace at 400°C. After annealing for 20 minutes in air, the alumina crucible is removed and allowed to cool naturally to room temperature. The resulting products are then rinsed multiple times in deionized water and ethanol to remove any soluble impurities. Finally, the product is dried thoroughly in a vacuum oven at 60°C to obtain the 2D nanosheets sample. Furthermore, when combined with N-Heterocyclic Carbenes, Cobalt(II) fluoride tetrahydrate has been found to be highly effective as a catalyst for cross-coupling reactions between aryl Grignard reagents and aryl as well as heteroaryl halides. This reaction results in the formation of unsymmetrical biaryls.

Synthesis

Weigh 22.5gCoCl3·6H2O dissolved in 60ml distilled water, heated to 40 ~ 50 ??, stirring dropwise addition of 30gNa2CO3·10H2O dissolved in 25ml distilled water hot solution, immediately reacted to get the rose-red CoCO3. aging 2h after filtration, washed with distilled water to the absence of chlorine ions, the CoCO3. CoCO3 was transferred to a polyethylene beaker and hydrofluoric acid was added dropwise until the solid CoCO3 disappeared and a rose-red solution was obtained. Evaporate to nearly dry, cool to get red crystals, filter, wash with a small amount of distilled water, dry at 80 ?? in moving air, placed in a P2O5 desiccator for spare. The product EDTA volumetric method to analyze the cobalt content, lead chloride precipitation volumetric method to analyze the fluorine content; the result is Co: 34175% (calculated value 34188%); F: 22140% (calculated value 22149%), deduced that the product of the experimental formula for: CoF2·4H2O.