Cobalt (III) hydroxide

General
Surname	Cobalt (III) hydroxide
other names	Cobalt trihydroxide
Molecular formula	Co (OH) 3
Brief description	brown solid
External identifiers / databases
CAS number 1307-86-4 EC number 215-153-0 ECHA InfoCard 100.013.776 PubChem 10103133 ChemSpider 8278661 Wikidata Q15632829
properties
Molar mass	109.95 g mol −1
Physical state	firmly
density	4.46 g cm −3 (trihydrate)
solubility	almost insoluble in water
safety instructions
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) hydroxide is an inorganic chemical compound of cobalt from the group of hydroxides .

Extraction and presentation

Cobalt (III) hydroxide precipitates as a brown precipitate when cobalt (III) salt solutions are mixed with alkalis.

properties

Cobalt (III) hydroxide is a brown solid that is insoluble in water and soluble in acids. It also occurs as a brown or purple colored trihydrate that is insoluble in water and alcohol but soluble in concentrated acids. It loses crystal water at 100 ° C. Under special conditions, the compound can dehydrate at 150 ° C via cobalt hydroxide oxide to cobalt (III) oxide .

use

Cobalt (III) hydroxide trihydrate can be used as a catalyst .

Individual evidence

1. ^ ^{A b} Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 388 ( limited preview in Google Book search).
2. ↑ ^{a b c d e} Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . Taylor & Francis US, 2011, ISBN 1-4398-1462-7 , pp. 487 ( limited preview in Google Book search).
3. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
4. ^ ^{A b} A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 1554.