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CAS No 7789-43-7 , dibromocobalt

  • Name: dibromocobalt
  • Synonyms: EINECS 232-166-7; Cobalt bromide; Cobalt bromide (CoBr2); 7789-43-7; HSDB 998; COBALTOUS BROMIDE;Cobalt(II) bromide; AG-H-12287; Cobalt dibromide;dibromocobalt;
  • CAS Registry Number:
  • Water Solubility: 112 g/100 mL in water
  • Safety Statements: A poison by ingestion. Exothermic reaction when heated with sodium. When heated to decomposition it emits toxic fumes of Br. See also BROMIDES.
  • Hazard Symbols: T: Toxic;Xn: Harmful;
  • EINECS: 232-166-7
  • Molecular Weight: 218.741195
  • InchiKey: BZRRQSJJPUGBAA-UHFFFAOYSA-L
  • InChI: InChI=1S/2BrH.Co/h2*1H;/q;;+2/p-2
  • Risk Statements: 45-20/21/22-36/37/38-42/43
  • Molecular Formula: Br2Co
  • Molecular Structure:CAS No:7789-43-7 dibromocobalt

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References of dibromocobalt
Title: Cobaltous Bromide
CAS Registry Number: 7789-43-7
Synonyms: Cobalt dibromide
Molecular Formula: Br2Co
Molecular Weight: 218.74
Percent Composition: Br 73.06%, Co 26.94%
Line Formula: CoBr2
Literature References: Prepn of hexahydrate from CoCO3 and HBr: Clark, Buchner, J. Am. Chem. Soc. 44, 230 (1922). Prepn of anhydr: eidem, loc. cit.; Watt et al., ibid. 77, 2752 (1955); Wydeven, Gregory, J. Phys. Chem. 68, 3249 (1964).
Properties: Bright green solid or lustrous green cryst leaflets. mp 678° (under HBr and N2); d425 4.909. Hygroscopic, forms hexahydrate in air. Readily sol in water, methanol, ethanol, acetone, methyl acetate.
Melting point: mp 678° (under HBr and N2)
Density: d425 4.909
 
Derivative Type: Hexahydrate
Properties: Red to reddish-purple, deliquesc, prismatic crystals. mp 47-48°. d425 2.46. Loses 4H2O at 100° giving the purple dihydrate, and all H2O by 130°. Sol in water giving red or blue soln depending on concn and temp, in methanol giving red soln, in ethanol, acetone, ether, methyl acetate giving blue solns. Keep well closed.
Melting point: mp 47-48°
Density: d425 2.46
 
Use: Chiefly in hygrometers; also in catalysts for organic reactions.