Functional Roles
Industries Served
Physical Properties
physical_description
Pellets or Large Crystals, Other Solid; Pellets or Large Crystals; Dry Powder, Pellets or Large Crystals; Dry Powder; Other Solid; Dry Powder, Other Solid
color/form
Light to dark green, fine, hexagonal crystals
boiling_point
4000 u00b0C
melting_point
2435 u00b0C
solubility
Practically insoluble in alcohol, acetone; slightly soluble in acids, alkalies
density
5.22 at 25 u00b0C
stability/shelf_life
Stable under recommended storage conditions.
ph
Trivalent chromium compounds are amphoteric
refractive_index
Index of refraction: 2.551
other_experimental_properties
Turns brown on heating, but reverts to green color on cooling. Crystalline chromic oxide is extremely hard; will scratch quartz, topaz, zircon.
GHS / SDS Safety
Danger
Environmental Hazard
Irritant
Health Hazard
- H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled [Danger Sensitization, respiratory]
- H317 (25.7%): May cause an allergic skin reaction [Warning Sensitization, Skin]
- H302 (24%): Harmful if swallowed [Warning Acute toxicity, oral]
- H317: May cause an allergic skin reaction [Warning Sensitization, Skin]
- H319 (24.3%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
- H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
- H360 (14.6%): May damage fertility or the unborn child [Danger Reproductive toxicity]
Chemical Identity
| CAS Number | 1308-38-9 |
| IUPAC Name | oxo(oxochromiooxy)chromium |
| InChI Key | QDOXWKRWXJOMAK-UHFFFAOYSA-N |
| PubChem CID | 517277 |
| INCI Name | CI 77288 |
Synonyms & Trade Names
Full Description
Chromium(III) oxide (Cr2O3) is an inorganic chromium compound that functions as a green pigment and colorant in industrial applications. This material provides pigmentation and color properties for use in coatings & construction and plastics & polymers industries. With a molecular weight of 151.990 and high thermal stability (melting point 2435°C), it offers durable coloration performance in demanding industrial formulations.