Ferric Oxide, Iron Oxide Anhydrous, Diiron Trioxide, Hematite, R101, E172, 1309-37-1, 1317-60-8, 1332-37-2
IRON OXIDE (RED IRON OXIDE)
CHEMICAL PROFILE AND IDENTIFICATION
| Parameter |
Information |
| Chemical Name |
Iron(III) Oxide, Ferric Oxide |
| CAS Numbers |
1309-37-1 (α-Fe₂O₃), 1317-60-8 (Fe₂O₃·H₂O), 1332-37-2 (Iron Oxide) |
| Molecular Formula |
Fe₂O₃ |
| Molecular Weight |
159.69 g/mol |
| Appearance |
Red to brown solid powder |
| E Number |
E172 |
| Other Names |
Pigment Red 101, Pigment Red 102, Hematite, Red Iron Oxide, Colcothar, Rouge, Caput Mortuum, Jeweler's Rouge, Ferric Oxide, Iron Sesquioxide |
SECTION 1: PHYSICAL AND CHEMICAL PROPERTIES
| Property |
Value |
| Appearance |
Red to brown powder |
| Odor |
Odorless |
| Molecular Weight |
159.69 g/mol |
| Density (20°C) |
5.24 g/cm³ |
| Melting Point |
~1565°C (decomposes) |
| Solubility in Water |
Insoluble |
| Solubility in Acids |
Soluble (in HCl) |
| pH |
Neutral (aqueous dispersion) |
| Magnetic Property |
Paramagnetic (α-Fe₂O₃) / Ferrimagnetic (γ-Fe₂O₃) |
| Calcination Temperature |
>500°C |
| Color Range |
Red, yellow, brown, black |
| Specific Surface Area |
Variable (particle size dependent) |
| Refractive Index |
~2.9 |
| Hardness (Mohs) |
5-6 |
| Thermal Stability |
Stable at high temperatures |
SECTION 2: IRON OXIDE TYPES
| Compound |
Formula |
Color |
Mineral Name |
Application |
| Wüstite |
FeO |
Dark grey / black |
Wüstite |
Steel production |
| Hematite |
α-Fe₂O₃ |
Red |
Hematite |
Pigment, paints, cosmetics |
| Magnetite |
Fe₃O₄ |
Black |
Magnetite |
Magnetic materials |
| Limonite |
Fe₂O₃·H₂O |
Yellow / brown |
Limonite |
Pigment |
| Maghemite |
γ-Fe₂O₃ |
Brown |
Maghemite |
Magnetic recording media |
| Goethite |
α-FeOOH |
Yellow / brown |
Goethite |
Pigment |
SECTION 3: APPLICATIONS
3.1 Pigment and Paint Industry
| Application |
Description |
| Pigment (CI 77491) |
Used as red, yellow, brown, black pigment. Durable, non-toxic, stable to light and chemicals |
| Paints and Coatings |
Facade paints, automotive paints, industrial coatings, primer paints |
| Plastics and Rubber |
Coloring agent |
| Ceramics and Glass |
Glaze colorant |
| Cosmetics |
Colorant (classified as safe) |
3.2 Construction and Building Materials
| Application |
Description |
| Cement and Concrete |
Coloration and pigment |
| Bricks and Tiles |
Colorant |
| Asphalt Coating |
Coloration |
3.3 Steel and Metallurgy
| Application |
Description |
| Iron Ore |
Raw material for steel production |
| Blast Furnaces |
Iron production |
3.4 Catalyst
| Application |
Description |
| Catalytic Reactions |
Fe(III) oxide as catalyst in oxidation reactions |
| Ammonia Synthesis |
Haber-Bosch process |
| Water-Gas Shift Reaction |
Shift reaction |
3.5 Nanotechnology and Biomedical
| Application |
Description |
| Magnetic Nanoparticles |
MRI contrast agent |
| Drug Delivery Systems |
Targeted drug delivery |
| Hyperthermia Therapy |
Magnetic hyperthermia in cancer treatment |
| Environmental Applications |
Heavy metal adsorption |
3.6 Other Applications
| Application |
Description |
| Metal Polishing |
Rouge (polishing powder) |
| Water Treatment |
Heavy metal adsorption (arsenic, lead, cadmium) |
| Magnetic Storage |
Magnetic media |
| Solar Cells |
Photocatalytic applications |
SECTION 4: NANOPARTICLE PROPERTIES
| Property |
Description |
| Superparamagnetism |
Size-dependent magnetic properties |
| High Surface Area |
Increased adsorption capacity in nanoparticles |
| Synthesis Methods |
Thermal decomposition, co-precipitation, sol-gel |
| Magnetic Saturation (Ms) |
74.4-92.6 emu/g (temperature dependent) |
SECTION 5: SAFETY INFORMATION
| Parameter |
Value |
| GHS Classification |
Generally non-toxic |
| Skin Irritation |
May cause irritation (dust) |
| Eye Irritation |
May cause irritation (dust) |
| Inhalation |
Dust may be harmful |
| Ingestion |
May be harmful (seek medical attention) |
| Carcinogenicity |
Not classified as carcinogenic |
SECTION 6: STORAGE
| Parameter |
Information |
| Storage Conditions |
Dry, well-ventilated area |
| Materials to Protect From |
Moisture, acids |
| Shelf Life |
Unlimited (under proper storage) |
| Packaging |
Tightly closed, original packaging |
SECTION 7: SYNONYMS AND TRADE NAMES
| Synonym |
Description |
| Caput mortuum |
Historical pigment name |
| Colloidal ferric oxide |
Fine particle form |
| Deanox |
Trade name |
| Ferrugo |
Rust pigment |
| Iron sesquioxide |
Chemical synonym |
| Jeweler's rouge |
Polishing compound |
| Rouge |
Polishing powder |
| Rubigo |
Rust |
| Crocus (iron oxide) |
Polishing compound |
| α-Ferric oxide |
Alpha crystalline form |
| γ-Ferric oxide |
Gamma crystalline form |
| Colcothar |
Red iron oxide pigment |
| Bayer S 11 |
Brand name |
| Felac |
Brand name |
| Pigdex 100 |
Brand name |
| Red oxide |
Common name |
| Venetian red |
Red pigment |
| English red |
Red pigment |
| Mars red |
Synthetic red iron oxide |
| Pferrox 2228 |
Brand name |
| Bayferrox 110M |
Brand name |
| Mapico Red 347 |
Brand name |
| Micronox |
Nanoparticle form |
| Nanogard |
Nanoparticle form |
| Bengara |
Japanese red iron oxide |
| Toda Color |
Brand name |
| Sicotrans Red |
Transparent red iron oxide |
| Bengala |
Red iron oxide |
| Sanylene Brown |
Brown pigment |
| Kroma Red |
Brand name |
| Cerac I |
Brand name |
| SunPuro Red |
Brand name |
| Synox HR 1208 |
Brand name |
| Nubifer EF |
Brand name |
| Colortherm Red |
Brand name |
| Ferroxide |
Brand name |
| Tarox |
Brand name |
LEGAL DISCLAIMER
The information provided in this document is based on our current knowledge and experience and is presented in good faith; however, as all conditions of use are beyond our control, it does not constitute a binding specification or warranty. This Technical Data Sheet is for informational purposes only. Users are responsible for testing the suitability for their own applications. For complete safety, storage, use, handling, disposal, and regulatory compliance information, please refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier.
