Cobalt (III) sulfate

General
Surname	Cobalt (III) sulfate
other names	Dicobalt trisulfate
Molecular formula	Co 2 (SO 4 ) 3
Brief description	blue-green solid
External identifiers / databases
EC number	236-772-2
ECHA InfoCard	100.033.415
PubChem	9822593
ChemSpider	7998342
Wikidata	Q4445802
properties
Molar mass	730.37 g mol −1
Physical state	firmly
solubility	Decomposes in water; Soluble in dilute sulfuric acid;
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Cobalt (III) sulfate is an inorganic chemical compound of cobalt from the group of sulfates .

Extraction and presentation

Cobalt (III) sulfate 18 hydrate (Co ₂ (SO ₄ ) ₃ · 18H ₂ O) can be obtained by anodic oxidation of a sulfuric acid solution of cobalt (II) sulfate heptahydrate at 0 ° C.

properties

Cobalt (III) sulfate is a solid that is present as blue-green, shiny flakes. It is a powerful oxidizing agent and quickly decomposes in a dry atmosphere when heated to a brown, then reddish powder. Ice-cold water rapidly decomposes with the formation of oxygen and cobalt (II) sulfate. With dilute sulfuric acid , it forms a green solution that is stable for a few days. When mixed with alkali, cobalt oxide hydroxide is deposited . With alkali metal sulfates it forms dark blue cobalt alum , e.g. B. Potassium cobalt sulfate dodecahydrate KCo (SO ₄ ) ₂ · 12H ₂ O.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1668.
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 1556.

[brauer-1] ↑ ^a ^b ^c ^d ^e ^f Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1668.

[NV-2] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[Arnold_F._Holleman,_Egon_Wiberg,_Nils_Wiberg-3] AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 1556.