- Registry number
- CHEM-008
- Preferred designation
- Iron(III) oxide
- Common names
- Hematite · red iron oxide
- Chemical formula
- Fe₂O₃
- CAS registry
- 1309-37-1
- PubChem CID
- 518696
- Formula mass
- 159.69 g/mol
- Class
- Metal oxide
Description & appearance
Red-brown to dark mineral or powder; appearance varies with particle size and form.
Occurrence & historical provenance
Occurs as hematite and in iron-rich geological deposits. Iron-oxide pigments appear throughout archaeological material culture.
Established uses
Pigments, ceramics, magnetic and electronic materials research, and iron-production feedstocks.
Hazards & handling context
Fine particulate exposure is a consideration. Do not assume any rust-colored residue has a single verified composition.
Important distinctions
Iron(II,III) oxide (magnetite) has a different formula, Fe₃O₄, and different properties.
Source ledger
The following reference records were consulted for chemical identity and general descriptive claims. Industrial grades, formulations, and mixtures may have different hazard profiles.
Catalogued 2026-11-11 · PyreArms 0.2.0. This is an authored reference entry, not a certificate of laboratory analysis.