Cobaltous Potassium Sulfate
Structural Formula Vector Image
Title: Cobaltous Potassium Sulfate
CAS Registry Number: 13596-22-0
Additional Names: Potassium cobaltosulfate; potassium cobaltous sulfate; potassium disulfatocobaltate(II)
Molecular Formula: CoK2O8S2
Molecular Weight: 329.26
Percent Composition: Co 17.90%, K 23.75%, O 38.87%, S 19.48%
Line Formula: K2Co(SO4)2
Literature References: Prepn: Gmelins, Cobalt (8th ed.) 58 (part A), 414 (1932) and supplement, 782-786 (1961).
Derivative Type: Hexahydrate
Properties: Red, monoclinic, prismatic crystals. Loses water on heating above 75°, forming the reddish-brown dihydrate which is stable from 120 to 150°; becomes anhydr (violet solid) at about 200°. d420 2.22. Freely sol in water.
Density: d420 2.22
Status: This monograph has been retired and is no longer subject to revision or update.

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