7791-13-1 Usage
Chemical Description
Cobalt chloride hexahydrate is a cobalt salt used in the synthesis of cobaloximes.
Uses
Different sources of media describe the Uses of 7791-13-1 differently. You can refer to the following data:
1. Cobalt(II) chloride has several applications. It is used in hygrometers; as a humidity indicator; as a temperature indicator in grinding; as a foam stabilizer in beer; in invisible ink; for painting on glass; in electroplating; and a catalyst in Grignard reactions, promoting coupling with an organic halide. It also is used to prepare several other cobalt salts; and in the manufacture of synthetic vitamin B12.
2. Cobalt(II) chloride hexahydrate (CoCl2·6H2O) has been found to be an efficient catalyst for the one-pot synthesis of biscoumarin derivatives through a combination of aromatic aldehydes and 4-hydroxycoumarin in aqueous media at 70°C. Cobalt chloride hexahydrate can be used as an inducer of HIF-1 production used to study apoptotic effects in HepG2 cells. It is also used as APHA color standard.
Preparation
Cobalt(II) chloride is prepared by the action of cobalt metal or its oxide, hydroxide, or carbonate with hydrochloric acid:
Co(OH)2 + 2HCl → CoCl2 + 2H2O
The solution on concentration and cooling forms crystals of hexahydrate which on heating with SOCl2 dehydrates to anhydrous cobalt(II) chloride. Alternatively, the hexahydrate may be converted to anhydrous CoCl2 by dehydration in a stream of hydrogen chloride and dried in vacuum at 100–150°C.
The anhydrous compound also may be obtained by passing chlorine over cobalt powder.
Reactions
Cobalt(II) chloride undergoes many double decomposition reactions in aqueous solution to produce precipitates of insoluble cobalt salts. For example, heating its solution with sodium carbonate yields cobalt(II) carbonate:
CoCl2 + Na2CO3 CoCO3 + 2NaCl
Reaction with alkali hydroxide produces cobalt(II) hydroxide:
CoCl2 + 2NaOH → Co(OH)2 + 2NaCl
Reaction with ammonium hydrogen phosphate yields cobalt(II) phosphate:
3CoCl2 + 2(NH4)2HPO4 → Co3(PO4)2 +4NH4Cl + 2HCl
While cobalt(II) fluoride is the product of the reaction of anhydrous cobalt(II) chloride with hydrofluoric acid, cobalt(III) fluoride is obtained from fluorination of an aqueous solution of cobalt(II) chloride.
Addition of potassium nitrite, KNO2 to a solution of cobalt(II) chloride yields yellow crystalline potassium hexanitrocobaltate(III), K3Co(NO2)6.
Toxicity
The compound is toxic at high doses. Symptoms include chest pain, cutaneous flushing, nausea, vomiting, nerve deafness, and congestive heart failure. The systemic effects in humans from ingestion include anorexia, increased thyroid size, and weight loss (Lewis (Sr.), R. J. 1996. Sax’s Dangerous Properties of Industrial Materials, 9th ed. New York: Van Nostrand Reinhold). Ingestion of a large amount (30–50 g) could be fatal to children.
Chemical Properties
Cobalt(II) chloride hexahydrate takes the form of purple crystals. Upon heating, it loses its water of crystallisation and decomposes into blue crystals of anhydrous cobalt(II) chloride. Soluble in water, soluble in ethanol, acetone and ether.Cobalt chloride hexahydrate is utilized in commercial applications such as electroplating, catalyst preparation, painting on glass and porcelain, and in the manufacture of vitamin B12.
Definition
ChEBI: Cobalt chloride hexahydrate is a hydrate of cobalt chloride containing cobalt (in +2 oxidation state), chloride and water moieties in the ratio 1:2:6. It has a role as an allergen. It contains a cobalt dichloride.
Application
Cobalt chloride hexahydrate can be used as Invisible ink; humidity and water indicator; in hygrometers; tempereture indicator in grinding; in electroplating; for painting on glass and porcelain; preparation of catalysts; fertilizer and feed additive; foam stabilizer in beer; as absorbent for military poison gas and ammonia; in manufacture of vitamin B12.
General Description
Cobalt(II) chloride hexahydrate has a cobalt ion surrounded by a tetragonal arrangement of chloride ligands. Four water molecules occupy a square plane about cobalt while chloride ions occupy axial positions. Its crystals belong to the monoclinic lattice system.
Structure and conformation
The hexahydrate COCl2.6H2O forms monoclinic crystals in which each cobalt atom is surrounded by four water molecules at the corners of a distorted square (Co-H20 = .12) and by two chlorine atoms (Co-Cl = 2.43) to form a distorted octahedron.The other two water molecules are not bonded directly to cobalt. In the monoclinic dihydrate CoCl2.2H2O, the octahedral symmetry around the cobalt atom is maintained by the sharing of chlorine atoms between two cobalt atoms. In the flattened octahedral structuress there are two Co-Cl distances of 2-450, two of 2.478 and two Co-H2O distances of 2.040.
Check Digit Verification of cas no
The CAS Registry Mumber 7791-13-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,9 and 1 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 7791-13:
(6*7)+(5*7)+(4*9)+(3*1)+(2*1)+(1*3)=121
121 % 10 = 1
So 7791-13-1 is a valid CAS Registry Number.
InChI:InChI=1/ClH.Co.6H2O/h1H;;6*1H2/q;+2;;;;;;/p-1
