Chromium(III) hydroxide

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Chromium(III) hydroxide
Chromium(III) hydroxide.png
IUPAC name
Chromium(3+) hydroxide
3D model (Jmol) Interactive image
ECHA InfoCard 100.013.781
PubChem 14787
RTECS number GB2670000
Molar mass 103.02 g/mol
Appearance green, gelatinous precipitate
Density 3.11 g/cm3
US health exposure limits (NIOSH):
PEL (Permissible)
TWA 1 mg/m3[1]
REL (Recommended)
TWA 0.5 mg/m3[1]
IDLH (Immediate danger)
250 mg/m3[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Chromium(III) hydroxide is an inorganic compound with the chemical formula Cr(OH)3. It is polymer with a undefined structure and low solubility. It is amphoteric, dissolving in both strong base and strong acid.[2]

It is used as a pigment, as a mordant, and as a catalyst for organic reactions.[3]

It is manufactured by adding a solution of ammonium hydroxide to a solution of chromium salt.


  1. ^ a b c "NIOSH Pocket Guide to Chemical Hazards #0141". National Institute for Occupational Safety and Health (NIOSH). 
  2. ^ Rai, Dhanpat; Sass, Bruce M.; Moore, Dean A. "Chromium(III) hydrolysis constants and solubility of chromium(III) hydroxide" Inorganic Chemistry 1987, volume 26, pp. 345-9. doi:10.1021/ic00250a002
  3. ^ Holleman, Arnold F.; Wiberg, Egon; Wiberg, Nils (1985). "Chromium". Lehrbuch der Anorganischen Chemie (in German) (91–100 ed.). Walter de Gruyter. pp. 1081–1095. ISBN 3-11-007511-3.