Melting point :895 °C (dec.)(lit.)
Boiling point :3800°C
Density :6.11 g/mL at 25 °C(lit.)
vapor pressure :0Pa at 20℃
solubility :insoluble in H2O; soluble in acid solutions, alkaline solutions
form :powder
color :Dark Gray
Specific Gravity :6.11
Water Solubility :Soluble in acids and alkalis. Insoluble in water.
Crystal Structure :Spinel type
crystal system :Cube
Merck :14,2429
Space group :Fd3m
Lattice constant :

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.80835	0.80835	0.80835	90	90	90	0.5282

Exposure limits :ACGIH: TWA 0.02 mg/m3
InChI :InChI=1S/3Co.4O
InChIKey :LBFUKZWYPLNNJC-UHFFFAOYSA-N
SMILES :O([Co]=O)[Co]=O.O=[Co]
CAS DataBase Reference :1308-06-1(CAS DataBase Reference)
NIST Chemistry Reference :Cobalt oxide(1308-06-1)
EPA Substance Registry System :Cobalt tetraoxide (1308-06-1)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled Sensitisation, respiratory Category 1 Danger P261, P285, P304+P341, P342+P311,P501 H412 Harmful to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 3 P273, P501
Precautionary statements:	P201 Obtain special instructions before use. P273 Avoid release to the environment. P308+P313 IF exposed or concerned: Get medical advice/attention.