Chromium oxide
CAS 1308-38-9
EC 215-160-9
Formula Cr2O3
MW 151.99 g/mol
Pigments & Colorants Coatings, Adhesives, Sealants & ElastomersPlastics & PolymersPrinting & PackagingBuilding & ConstructionTextile, Leather & PaperRubber & Tire Preservation & Biocide
Description
Chromium oxide (CAS 1308-38-9, EC 215-160-9, formula Cr2O3) is an inorganic green pigment commercially known as chromia, C.I. Pigment Green 17, and C.I. 77288. It carries no E-code designation and is distinct from hydrated chromium oxide (viridian). The compound is registered under REACH and classified under HS code 28199090.
In coatings and plastics, chromium oxide delivers stable green coloration by absorbing red and blue wavelengths while reflecting green, with exceptional resistance to heat, light, and chemical attack. In rubber and tire manufacturing, it functions as both a colorant and a mild antimicrobial agent, inhibiting microbial degradation of compounded formulations during storage and service.
Chromium oxide is supplied as a dry powder in technical and pigment grades, compliant with REACH registration requirements. Packaging typically includes 25 kg bags and bulk options. Buyers should confirm grade suitability against application-specific purity thresholds, particularly for coatings and construction end uses.
In coatings and plastics, chromium oxide delivers stable green coloration by absorbing red and blue wavelengths while reflecting green, with exceptional resistance to heat, light, and chemical attack. In rubber and tire manufacturing, it functions as both a colorant and a mild antimicrobial agent, inhibiting microbial degradation of compounded formulations during storage and service.
Chromium oxide is supplied as a dry powder in technical and pigment grades, compliant with REACH registration requirements. Packaging typically includes 25 kg bags and bulk options. Buyers should confirm grade suitability against application-specific purity thresholds, particularly for coatings and construction end uses.
Physical Properties
| Melting Point | 2435 °C |
| Boiling Point | 4000 °C |
| Density | 5.22 g/cm³ @ Temp: 25 °C |
| Flash Point | 3000°C |
| Appearance | Chromium oxide is a bright green, odorless powder |
| Color | Pale to dark green |
| Odor | at 100.00?%. odorless |
| Form | powder |
| Water Solubility | Insoluble |
| Refractive Index | 2.551 |
Safety & Handling (Learn More)
Danger GHS07 GHS08 GHS09
H
H302H317H319H334H360H372
P
P203P233P260P261P264P270P271P272P280P284P318P319P321P330P403P405P501P264+P265P301+P317P302+P352P304+P340P333+P317P337+P317P342+P316P362+P364P305+P351+P338
Trade & Regulatory
| HS Code | 28199090 |
| Storage Class | 11 - Combustible Solids |
Other Names
Chromium(III) Oxideoxo(oxochromiooxy)chromiumchromiadichromium trioxide
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Raw Materials
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