2436. Cobaltous Carbonate

Nomenclature

CAS number: 513-79-1
Carbonic acid cobalt (2+) salt (1:1).
CCoO3; mol wt 118.94.
C 10.10%, Co 49.55%, O 40.35%.
CoCO3.

Description and references

Occurs in nature as the mineral cobalt spar or sphaerocobaltite. Prepd by heating a soln of a cobaltous salt with Na2CO3: Schlessinger, Inorg. Synth. 6, 189 (1963) where it is the starting material for the prepn of trinitrotriamminecobalt. Review: de Bie, Doyen, Cobalt 15, 3-13; 16, 3-15 (1962).

Properties

Red powder or rhombohedral crystals. d 4.13. Almost insol in water, alcohol, methyl acetate. Does not react with cold concd HNO3 or HCl; when heated, dissolves with evolution of CO2. Oxidized by air or weak oxidizing agents to cobaltic carbonate.

Derivative

Cobaltous carbonate basic.

Nomenclature

CAS number: 12602-23-2
Cobalt carbonate hydroxide.
C2H6Co5O12; mol wt 516.73.
C 4.65%, H 1.17%, Co 57.03%, O 37.16%.

Properties

Co5(OH)6(CO3)2. Pale-red powder, usually containing some water. Practically insol in water; sol in dilute acids and ammonia.

Use

In ceramics; manuf of Co pigments; prepn of Co compds.

Therapeutic Category (Veterinary)

Nutritional factor. Used in cobalt deficiency in ruminants.