Melting point :1538 °C(lit.)
Density :4.8-5.1 g/mL at 25 °C(lit.)
refractive index :3.0
Flash point :7 °C
storage temp. :-20°C
solubility :Aqueous Acid (Slightly)
form :powder
color :black
Specific Gravity :5.2
Odor :at 100.00?%. odorless
Water Solubility :Insoluble in water and organic solvents. Soluble in concentrated mineral acids.
Crystal Structure :Inverse spinel type
crystal system :Cube
Merck :14,4040
Space group :Fd3m
Lattice constant :

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.83941	0.83941	0.83941	90	90	90	0.5915

Stability :Stable. Incompatible with strong acids, chloroformates, peroxides.
CAS DataBase Reference :1317-61-9(CAS DataBase Reference)
NIST Chemistry Reference :Iron(ii,iii) oxide(1317-61-9)
EPA Substance Registry System :Iron oxide (Fe3O4) (1317-61-9)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501 H304 May be fatal if swallowed and enters airways Aspiration hazard Category 1 Danger H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning H336 May cause drowsiness or dizziness Specific target organ toxicity,single exposure; Narcotic effects Category 3 Warning P261, P271, P304+P340, P312,P403+P233, P405, P501 H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501 H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P273 Avoid release to the environment. P281 Use personal protective equipment as required. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P331 Do NOT induce vomiting. P405 Store locked up.