Cobalt(II) bromide

  • Cobaltdibromid
  • Cobalt (II ) bromide
  • 7789-43-7
  • 85017-77-2 ( hydrate)

Green solid

Fixed

  • 4.909 g · cm -3 ( 25 ° C)
  • 2.46 g · cm -3 ( hexahydrate)
  • 678 ° C
  • 47-48 ° C ( hexahydrate)

Soluble in acetone, ethanol and methanol

Risk

406 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

Cobalt bromide is a chemical compound of cobalt and is one of the bromides.

Production and representation

Cobalt bromide may be obtained by reaction of cobalt to bromine.

It can also be obtained by thermal decomposition of the hexahydrate at 130-150 ° C.

Also possible is the representation of cobalt (II ) acetate tetrahydrate and acetyl bromide.

Properties

Cobalt bromide is a green hygroscopic solid, which turns on the air in the red hexahydrate. In water, it is readily soluble in red. Cobalt bromide has a cadmium iodide crystal structure. The red hexahydrate melts in air. There are over concentrated sulfuric acid or when heated to 130-140 ° C from all crystal water. At 100 ° C the hexahydrate are from crystal water and goes into the purple dihydrate. The dihydrate has a crystal structure of a copper ( II) chloride dihydrate to the space group C2 / m.

Use

Cobalt bromide may be used as a catalyst in the oxidation of organic compounds.

CAS registry number PubChem Dangerous Substances Directive (67/548/EEC) Cobalt(II) acetate Digital Object Identifier Cobalt(II) fluoride Cobalt(III) fluoride
195477
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