Nomenclature
CAS number: 71-48-7
Acetic acid cobalt(2+) salt (2:1); cobalt(II) acetate.
C
4H
6CoO
4; mol wt 177.02.
C 27.14%, H 3.42%, Co 33.29%, O 36.15%.
Co(C
2H
3O
2)
2.
Description and references
Prepd commercially from cobaltous hydroxide
or carbonate and an excess of dil acetic acid: Morral in Kirk-Othmer Encyclopedia of Chemical Technology vol. 5 (Interscience, New York, 2nd ed., 1964) p 737;
prepn from powdered Co and acetic acid: Hahl, US 3133942 (1964 to BASF); prepn
by oxidation of Co carbonyls in the presence of acetic acid: Gwynn et al., US 3246024 (1966 to Gulf). Review: de Bie,
Doyen, Cobalt 15, 3-13; 16, 3-15 (1962).
Properties
Light-pink crystals. Readily sol in water.Derivative
Tetrahydrate.
Nomenclature
CAS number: 6147-53-1
Bis(acetato)tetraaquocobalt.
Co(C
2H
3O
2)
2.4H
2O; mol wt 249.08.
Co 23.66%, C 19.29%, H 5.67%, O 51.39%.
Properties
Intense red, monoclinic, prismatic crystals. d 1.705. On heating becomes
anhydrous by 140°. Sol in water, alcohols, dil acids, pentyl acetate.
pH of 0.2 molar aq soln 6.8.Use
Bleaching agent and drier for lacquers, varnishes;
in anodizing; catalyst for oxidation and esterification; foam stabilizer
for malt beverages.