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Chromium oxide (11118-57-3)

Identification
Name:Chromium oxide
Synonyms:Chromeoxide;Chromic acid, chromium salt;
CAS:11118-57-3
EINECS: 234-361-2
Molecular Formula: Cr2O3
Molecular Weight: 99.9943
InChI: InChI=1S/Cr.3O
Molecular Structure: (Cr2O3) Chromeoxide;Chromic acid, chromium salt;
Properties
Melting Point: 2435 oC
Boiling Point: 4000 oC
Density:5.22 g/cm3
Water Solubility:in water insoluble
Solubility:in water insoluble
Appearance:bright green powder
Specification:

  Chromium oxide (CAS NO.11118-57-3), its Synonyms are Chromic acid, chromium salt ; Chromium chromate . It is one of principal oxides of chromium. It adopts the corundum structure, consisting of a hexagonal close packed array of oxide anions with 2/3 of the octahedral holes occupied by chromium. Similar to corundum, Cr2O3 is a hard, brittle material (Mohs hardness 8-8.5). It is antiferromagnetic up to 307 K, the Neel temperature. It is not readily attacked by acids or bases, although molten alkali gives chromites. It turns brown when heated, but reverts to its dark green color when cooled. It is also hygroscopic.

Color: Dark red, bipyramidal prismatic crystals, flakes or granular powder
BROWN SOLID
Flake, ground powder form
Dark-red ... flakes or powder [Note: Often used in an aqueous solution (H2CrO4)].
Safety Data