Cobalt(III)oxide , 98% , 1308-04-9

Synonym(s):
Cobalt tetraoxide;Cobaltic-cobaltous oxide;Tricobalt tetraoxide

CAS NO.：1308-04-9

Empirical Formula: Co2O3

Molecular Weight: 165.86

MDL number: MFCD00036266

EINECS: 215-156-7

PRODUCT Properties

• Melting point: 895 °C (dec.)(lit.)
• Density: 6.11 g/mL at 25 °C(lit.)
• storage temp.: Inert atmosphere,Room Temperature
• solubility: insoluble in H2O; soluble in concentrated acid solutions
• form: powder
• color: gray-black
• Water Solubility: insoluble H2O; soluble conc acids [HAW93]
• EPA Substance Registry System: Cobalt oxide (Co2O3) (1308-04-9)

Description and Uses

Neither the oxide Co2O3 nor the hydroxide Co(OH)3 is definitely established. The oxidation of cobalt(II) hydroxide in aqueous suspension with, for example, peroxides, or the destruction of a cobalt(III) complex with alkali gives a brown or black powder Co2O3.aq which upon drying at 150° yields the monohydrate Co2O3.H2O; this is probably best formulated as CoO(OH). When heated further in attempts to dehydrate it, the "monohydrate" begins to evolve oxygen (as well as water) at 300° with the formation of black Co3O4. When heated to 100° in air cobalt(II) hydroxide is converted to dark brown CoO(OH).

Pigment, coloring enamels, glazing pottery.

Safety

• Symbol(GHS): GHS08,GHS07
• Signal word: Warning
• Hazard statements: H351-H317-H410-H302
• Precautionary statements: P201-P202-P281-P308+P313-P405-P501-P264-P270-P301+P312-P330-P501-P261-P272-P280-P302+P352-P333+P313-P321-P363-P501-P273-P391-P501
• Hazard Codes: Xn
• Risk Statements: 36/37/38-40-43-22
• Safety Statements: 26-36/37/39-36/37
• WGK Germany: 1
• RTECS: GG2500000
• Toxicity: mouse,LD50,subcutaneous,2064mg/kg (2064mg/kg),Zhurnal Vsesoyuznogo Khimicheskogo Obshchestva im. D.I. Mendeleeva. Journal of the D.I. Mendeleeva All-Union Chemical Society. Vol. 19, Pg. 186, 1974.