PENTAAMMINECHLOROCOBALT(III) CHLORIDE Property

Density 

1.819

form 

powder

Specific Gravity

1.819

Water Solubility 

Soluble in water.

Exposure limits

ACGIH: TWA 0.02 mg/m3

EPA Substance Registry System

Cobalt(2+), pentaamminechloro-, dichloride, (OC-6-22)- (13859-51-3)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-37/39

WGK Germany 

3

TSCA 

Yes

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H317May cause an allergic skin reaction

H334May cause allergy or asthma symptoms or breathing difficulties if inhaled

H351Suspected of causing cancer

H413May cause long lasting harmful effects to aquatic life

Precautionary statements

P201Obtain special instructions before use.

P273Avoid release to the environment.

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

P302+P352IF ON SKIN: wash with plenty of soap and water.

P308+P313IF exposed or concerned: Get medical advice/attention.

PENTAAMMINECHLOROCOBALT(III) CHLORIDE Chemical Properties,Usage,Production

Chemical Properties

brick red crystal(s) [KIR79] [ALD94]

Uses

A nanocomposite of nanophotoadduct of pentaamminechlorocobalt(III) chloride with hexamine and polythiophene (PTh)may be used in high temperatures electrical appliances. It may be used along with potassium tris(oxalato)chromate(III) to synthesize heterometallic compound, [CoCl(NH₃ )₅ ] [KCr(C₂ O₄ )₃ ]?0.5H₂O.This heterometallic compound has several potential applications such as microporous hybrid material with organic π-donors.

Preparation

Chloropentaamminecobalt (III) Chloride is obtained by oxidation of an ammoniacal CoCl3 solution, and purified via [Co(NH3)sH2O]2(C2O4)3 ? 4H3O.
A solution of 20 g. of precipitated cobalt carbonate in some 1:1 HCl is prepared, filtered and cooled; a mixture of 250 ml. of cone, ammonia and 50 g. of (NH4)3CO3 dissolved in 250 ml. of H3O is then added. The mixture is oxidized for three hours by bubbling in a stream of air. After addition of 150 g. of NH4Cl the solution is evaporated to sirup consistency on the steam bath. Dilute HCl is added to drive off the CO 2 and produce a weakly acid reaction; then ammonia is added to give a weakly basic solution, followed by 10 ml. of additional cone, ammonia. The liquid, whose volume at this point is 400-500 ml., is heated on the steam bath until all the tetraammine salt disappears; it is then treated with 300 ml. of cone. HCl and heated for 30-45 minutes on the steam bath. The [Co(NH3)5- Cl]Cl2 precipitates on cooling. It is filtered off and washed with 1:1 HCl until free of NH4Cl, then with alcohol until free of acid. The salt still contains some [Co(NH3) 5]Cl3. Yield: 34.5 g.