Iron oxide black

Systematic Name: Bis(Oxoferriooxy)iron
Synonyms of Iron oxide black (CAS NO.1309-38-2): Magnetic Black ; Magnetic oxide ; Triiron tetraoxide ;  Iron(II,III) oxide  
CAS NO: 1309-38-2
Molecular Formula: Fe₃O₄
Molecular Weight: 231.5326
Molecular Structure:
EINECS: 235-442-5
H bond acceptors: 4
H bond donors: 0
Freely Rotating Bonds: 4
Polar Surface Area: 52.6 Å² 
Melting Point: 1538 °C(lit.)
Density: 4.8-5.1 g/mL at 25 °C(lit.)
Appearance: Black or dark red powder.
Solubility: Insoluble in water, alcohol, soluble in strong acid, hot acid.
SMILES: O=[Fe]O[Fe]O[Fe]=O
InChI: InChI=1/3Fe.4O/rFe3O4/c4-1-6-3-7-2-5
InChIKey: SZVJSHCCFOBDDC-ANEJRGPMAJ
Std. InChI: InChI=1S/3Fe.4O
Std. InChIKey: SZVJSHCCFOBDDC-UHFFFAOYSA-N
Product Categories of Iron oxide black (CAS NO.1309-38-2): INORGANIC & ORGANIC CHEMICALS;UVCBs-inorganic;Inorganics

 Iron oxide black(CAS NO.1309-38-2) is used for an inorganic black pigments. It can be widely used in ink, watercolor, oil paints, paint, building coating, building materials coloring. Besides it is also used for the manufacture of magnets electronic telecommunications industry , and mineral raw materials in the metallurgical industry.

Reported in EPA TSCA Inventory.

Hazard Codes: Xi
Risk Statements: 36/37/38
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36/37/39
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection.
TSCA: Yes
Mixtures with aluminum + calcium silicide + sodium nitrate may explode if ignited. Mixtures with aluminum + sulfur react violently if heated. Ignites on contact with hydrogen trisulfide. See also IRON and IRON COMPOUNDS.