Cobalt oxide (II)

Cobalt oxide (II)
IUPAC name Cobalt oxide (II)
Identification information
CAS registration number	1307-96-6
RTECS number	GG2800000
Characteristic
Chemical formula	CoO
Molar mass	74.93 g mol-1
The appearance	Black powder
Density	6.1 g cm-3
Melting point	1,933 degrees Celsius (2206 K)
Solubility to water	It is 難溶 in water It is soluble to strong acid
The risk
The main risk	I stimulate respiratory organs Carcinogenicity
NFPA 704	0 2 0
R phrase	22 43 50-53
S phrase	(2-)24-37-60-61
Associated material
Other anions	Cobalt chloride (II)
Related material	Cobalt oxide (III)
I can put a case, the data without the special mention for normal temperature (25 degrees Celsius), the ordinary pressure (100 kPa).

Cobalt oxide (II)(Cobalt(II) oxide) is black powder from a red crystal or gray from yellowish green [¹]. I am used for composition of the cobalt (II) salt to a glaze of the blue and enamel by the ceramics industry in Chemical Industrial. The crystal of CoO is periclase (halite) structure, and the grating constant is 4.2615Å [²].

I disintegrate to cobalt oxide (II) and oxygen when I heat cobalt oxide (II,III) to 950 degrees Celsius [³].

2 Co₃O₄ → 6 CoO + O₂

Table of contents

Coloring agent

Cobalt oxide (II) was used as a coloring agent of ceramics for several centuries and it was old and was used in Germany of the twelfth century [⁴]. The ceramics which cobalt oxide (II) was added in are colored 深青色 called the cobalt blue.

Footnote

1. ^ "Safety (MSDS) data for cobalt oxide." The Physical and Theoretical Chemistry Laboratory, Oxford University. November 11, 2008 reading.
2. ^ Phys. Rev. B 35 6847 http://link.aps.org/abstract/PRB/v35/p6847
3. ^ Process for making a cobalt oxide catalyst, James, Leonard E. (Richmond, VA) Crescentini, Lamberto (Chester, VA) Fisher, William B. (Chester, VA) is http://www.freepatentsonline.com/4389339.html 1983
4. ^ Zamek, Jeff: "A Problem With Cobalt? "Ceramics Today http://www.ceramicstoday.com/articles/zamek_cobalt.htm

Allied item

• Cobalt oxide (III)
• Cobalt oxide (II,III)

Outside link

• International Chemical Safety Card cobalt oxide (II) - National Institute of Health Sciences

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