Nomenclature
CAS number: 10141-05-6
Nitric acid cobalt(2+) salt (2:1); cobalt(II) nitrate.
CoN
2O
6; mol wt 182.94.
Co 32.21%, N 15.31%, O 52.47%.
Co(NO
3)
2.
Description and references
Prepn: Gmelins, Cobalt (8th ed.) 58 (part A), 252-262 (1932) and supplement,
515-521 (1961); Weigel et al., Bull. Soc. Chim. Fr. 1964, 836; Addison, Sutton, J. Chem. Soc. 1964, 5553. Toxicity
study: G. J. A. Speijers et al., Food Chem. Toxicol. 20, 311 (1982). Review
of toxicology: B. Venugopal, T. D. Luckey, Environ. Qual. Safety Suppl. 1, 4-73 (1975). Review: de Bie, Doyen, Cobalt 15, 3-13; 16, 3-15 (1962).
Properties
Pale red powder. Dec at 100-105°. d 2.49. Sol in water. LD in rabbits (mg/kg): 250 orally, 75 s.c. (Venugopal, Luckey).Derivative
Hexahydrate.
Nomenclature
CAS number: 10026-22-9
CoN
2O
6.6H
2O; mol wt 291.03.
Co 20.25%, N 9.63%, O 65.97%, H 4.16%.
Properties
Red, deliquesc, monoclinic crystals. mp ≈55°. Red liquid
becomes green and dec to the oxide above 74°. d 1.88. Very sol in water, alcohol, most organic
solvents. Keep well closed in a cool place. LD50 orally in rats: 691 mg/kg (Speijers).Use
Manuf of cobalt pigments and invisible inks; decorating
stoneware and porcelain; prepn of catalysts; production of vitamin
B
12 supplements.