ChemicalBook Product Catalog Inorganic chemistry Inorganic salts Metal halide and Halogen salt Metal chlorides and salt HEXAAMMINECOBALT(III) CHLORIDE

HEXAAMMINECOBALT(III) CHLORIDE

Product NameHEXAAMMINECOBALT(III) CHLORIDE
CAS10534-89-1
MFCl3CoH18N6
MW267.48
EINECS234-103-9
MOL File10534-89-1.mol

Chemical Properties

Melting point	217 °C(lit.)
Density	1.71 g/mL at 25 °C(lit.)
storage temp.	room temp
solubility	Soluble in ammonia.
form	Powder
Specific Gravity	1.71
color	Orange to orange-brown
Water Solubility	Soluble in ammonia and water.
Merck	14,4675
Exposure limits	ACGIH: TWA 0.02 mg/m3
Stability	Stable. Incompatible with strong oxidizing agents.
Major Application	battery precursors catalysts material synthesis precursor
InChI	InChI=1S/3ClH.Co.6H3N/h31H;;61H3/q;;;+3;;;;;;/p-3
InChIKey	JXBGZYGSWFSYFI-UHFFFAOYSA-K
SMILES	N.N.N.N.N.N.[Co+3].[Cl-].[Cl-].[Cl-]
CAS DataBase Reference	10534-89-1(CAS DataBase Reference)
EPA Substance Registry System	Cobalt(3+), hexaammine-, trichloride, (OC-6-11)- (10534-89-1)

Safety Information

Hazard Codes	Xi
Risk Statements	36/37/38
Safety Statements	26
RIDADR	UN 2811 6.1/PG III
WGK Germany	3
TSCA	TSCA listed
HazardClass	6.1
PackingGroup	III
HS Code	2842908080
Storage Class	11 - Combustible Solids
Hazard Classifications	Aquatic Chronic 4 Carc. 2 Resp. Sens. 1 Skin Sens. 1

MSDS

Provider	Language
ACROS	English
SigmaAldrich	English
ALFA	English

Usage And Synthesis

Chemical Properties

solid

Uses

Hexaamminecobalt(III) chloride is a component of structural biology methods, especially for DNA or RNA, where the positive ions stabilize the tertiary structure of the phosphate backbone, which favors to solve their structure by X-ray crystallography. It serves as an excellent antibacterial and antiviral property.

Uses

As reagent for pyrophosphoric acid, for the estimation of phosphate.

Preparation

Synthesis of hexaamminecobalt(III) chloride
2CoCl2+10NH3+2NH4Cl+H2O2 →2[Co(NH3) 6]Cl3+2H2O
Reaction. Dissolve 2.5 g (10.5 mmol) of cobalt(II) chloride hexahydrate and 1.7 g (32 mmol) of ammonium chloride (about 195% excess) in 15 mL of distilled water. Add 0.5 g of activated charcoal and 23 mL (380 mmol) of concentrated aqueous ammonia (about 624% excess). Cool the reaction mixture to 0 oC in an ice bath. Slowly add 2 mL (19.5 mmol) of 30% hydrogen peroxide (about 271% excess), with stirring – maintain the temperature below 10°C. After the hydrogen peroxide has been added, heat the reaction mixture to 60°C for about 30 minutes. Cool the reaction mixture to 0 oC to cause precipitation of the product.

General Description

Hexammine cobalt(III) is considered an analog of fully solvated magnesium, capable of activating some enzymes that requires magnesium. It is useful in DNA condensation studies.

Purification Methods

It crystallises from warm water (8mL/g) on cooling. [Bjerrum & McReynolds Inorg Synth II 217 1946.]

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