Overview
Ferric ferrous oxide (CAS 1317-61-9 ), also known as Iron(II,III) oxide and commercially as E172 , is a mixed-valence iron oxide used across pigment, catalyst, and surface protection applications.
Its magnetic properties and chemical stability make it a reliable functional ingredient in both industrial and regulated end-use markets. In pigment manufacturing, it delivers a black colorant for concrete and coatings.
Construction materials utilize this oxide where consistent color performance and UV stability are required. Electronics producers use it as a core material in magnetic recording media and ferrite components.
It is also utilized in electromagnetic shielding applications. In catalysis, it functions as an active phase or support material in chemical synthesis and gas treatment processes, including hydrogen production.
Corrosion-inhibiting primers and protective coatings for automotive and structural steel applications incorporate it to extend substrate service life. It is supplied as a fine black powder in various grades.
Food-grade material is available under the E172 designation, meeting specifications for use as a colorant in regulated applications. Technical and pigment grades are also offered for industrial use.
Particle size and surface area specifications vary by end-use requirement. Our material ensures high purity and consistency for demanding manufacturing environments and specialized chemical formulations.
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Physical Properties
| Melting Point | 1535 °C |
| Density | 5.1 g/cm³ (solid) (nanoparticles) |
| Flash Point | 7 °C |
| Appearance | solid |
| Color | black |
| Odor | at 100.00?%. odorless |
| Form | powder |
| Water Solubility | Insoluble in water and organic solvents. Soluble in concentrated mineral acids. |
| Refractive Index | 3.0 |
Safety & Handling
Warning GHS02 GHS07 Hazard Statements H252 Self-heating in large quantities; may catch fire H315 Causes skin irritation H319 Causes serious eye irritation H335 May cause respiratory irritation Precautionary Statements P235 Keep cool. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P405 Store locked up. P407 Maintain air gap between stacks/pallets. P410 Protect from sunlight. P413 Store bulk masses greater than … kg/… lbs at temperatures not exceeding … °C/…°F. P420 Store away from other materials. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 28211000 |
| Storage Class | 11 - Combustible Solids |
Other Names
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Chemical Properties
- CAS Number
- 1317-61-9
- EC Number
- 215-277-5
- Mol. Weight
- 231.53
- HS Code
- 28211000
- Category
- Salts & Minerals