Chromium (III) chromate

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Structural formula
2 Chromium 3+ ion 3 Chromation
General
Surname Chromium (III) chromate
other names
  • Dichromtris (chromate)
  • chromic acid chromium oxide
Molecular formula Cr 2 (CrO 4 ) 3
Brief description

dark purple to black solid

External identifiers / databases
CAS number 24613-89-6
EC number 246-356-2
ECHA InfoCard 100.042.127
PubChem 32520
Wikidata Q1087509
properties
Molar mass 466.70 g mol −1
Physical state

firmly

density

2.27 g cm −3

solubility

soluble in water (96.6 g l −1 )

safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary
03 - Oxidising 08 - Dangerous to health 05 - Corrosive
07 - Warning 09 - Dangerous for the environment

danger

H and P phrases H: 271-350-314-317-410
P: ?
Authorization procedure under REACH

of particular concern : carcinogenic ( CMR ); subject to approval

MAK

Switzerland: 5 μg m −3 (calculated as chromium)

As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Chromium (III) chromate is a chemical compound from the group of chromates (a salt of chromic acid ). It often occurs as the hexahydrate Cr 2 (CrO 4 ) 3 · 6H 2 O.

properties

Chromium (III) chromate is a strong oxidizing agent .

use

Chromium (III) chromate can be used to produce chromium dioxide and to coat metals.

safety instructions

Chromium (III) chromate is carcinogenic and fire-promoting .

Individual evidence

  1. ↑ a b c d Entry on chromium (III) chromate in the GESTIS substance database of the IFA , accessed on February 21, 2017(JavaScript required) .
  2. ↑ Entry on Dichromium tris (chromate) in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
  3. ↑ Entry in the SVHC list of the European Chemicals Agency , accessed on August 20, 2014.
  4. ↑ Entry in the register of substances subject to authorization of the European Chemicals Agency , accessed on August 20, 2014.
  5. ↑ Swiss Accident Insurance Fund (Suva): Limit values ​​- current MAK and BAT values (search for chromium (VI) compounds ), accessed on October 27, 2015.
  6. ↑ patent specification
  7. ↑ henkel.com: Alodine 1132 Touch-N-Prep Light Metals Conversion Coating (MSDS of a coating mixture, English), accessed on August 29, 2013.