Product Overview
Iron Oxide Red (CAS#1309-37-1) is a synthetic inorganic pigment primarily composed of iron oxide compounds. It is widely recognized for its excellent color strength, chemical stability, weather resistance, and long-lasting performance.
Iron oxide pigments are available in a broad range of shades, including red, yellow, brown, and black, providing flexible solutions for different coloring requirements. Compared with natural pigments, synthetic Iron Oxide Red offers improved purity, controlled composition, and consistent performance.
Due to its outstanding stability, non-toxic characteristics, and wide compatibility, Iron Oxide Red is extensively used in cosmetics, food-grade pigments, coatings, plastics, construction products, ceramics, and various industrial materials, making it a reliable choice for high-quality coloration solutions.
Ferric oxide Chemical Properties
| Melting point | 1538°C |
| Density | 5.24 |
| Fp | >230 °F |
| Storage temp | 2-8°C |
| Solubility | It is soluble In Warm Hydrochloric Acid, Slightly Soluble in Sulfuric Acid. |
| Form | Pieces |
| Color | Black |
| Specific Gravity | 5.1～5.2 |
| PH | 3.7±0.3 |
| Water Solubility | INSOLUBLE |
| Crystal Structure | Corundum type |
| Crystal system | Three sides |
| Merck | 14,4028 |
| Space group | R3c |
| Lattice constant | a/nmb/nmc/nmα/oβ/oγ/oV/nm30.502590.502591.373590901200.3005 |
| Exposure limits | ACGIH: TWA 5 mg/m3 OSHA: TWA 10 mg/m3; TWA 15 mg/m3; TWA 5 mg/m3 NIOSH: IDLH 2500 mg/m3; TWA 5 mg/m3 |
| Stability | Stable. |
| CAS DataBase Reference | 1309-37-1(CAS DataBase Reference) |
| NIST Chemistry Reference | Iron(iii) oxide(1309-37-1) |
| IARC | 3 (Vol. 1, Sup 7) 1987 |
| EPA Substance Registry System | Ferric oxide (1309-37-1) |
Safety Information
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 26 |
| OEB | B |
| OEL | TWA: 5 mg/m3 |
| WGK Germany | - |
| RTECS | NO7400000 |
| TSCA | Yes |
| HS Code | 28211000 |
| Hazardous Substances Data | 1309-37-1(Hazardous Substances Data) |
| IDLA | 2,500 mg Fe/m3 |
Product Overview of Iron Oxide Red (CAS#1309-37-1)
Red Iron Oxide (Fe₂O₃) is a high-performance inorganic pigment widely recognized for its stable red coloration, excellent durability, and cost-effective properties. It can be obtained from both natural mineral sources and advanced synthetic manufacturing processes.
Synthetic Iron Oxide Red is produced through controlled chemical processes to achieve high purity, uniform particle size, and consistent color performance. Common production methods include the thermal treatment of iron sulfate with alkaline materials at elevated temperatures, as well as the oxidation and calcination of iron compounds under controlled air conditions.
Naturally sourced Iron Oxide Red is primarily derived from mineral deposits such as hematite (Fe₂O₃) and hydrated iron oxide minerals. Compared with natural pigments, synthetic grades provide better quality control, improved consistency, and enhanced suitability for industrial applications.
With its excellent light resistance, weather stability, chemical durability, and economical advantages, Iron Oxide Red is widely used in coatings, construction materials, ceramics, plastics, cosmetics, and other pigment-related industries.
