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Cobalt oxide

Cobalt oxides Uses Preparation Toxicity

Cobalt oxide

CAS No.1307-96-6
Chemical Name:Cobalt oxide
CBNumber:CB9216703
Molecular Formula:CoO
Formula Weight:74.93
MOL File:1307-96-6.mol

Cobalt oxide Property

Melting point 1785 °C
Density 6.45
bulk density 0.966g/cm3
vapor pressure 0Pa at 20℃
solubility insoluble in H2O; soluble in acid solutions
form Powder
Specific Gravity 6.45
color Green-brown
Water Solubility insoluble
Sensitive Air Sensitive
Crystal Structure NaCl type
crystal system Cube
Merck 14,2446
Space group Fm3m
Lattice constant
a/nm b/nm c/nm α/o β/o γ/o V/nm3
0.4263 0.4263 0.4263 90 90 90 0.0775
Exposure limits ACGIH: TWA 1 mg/m3
OSHA: TWA 15 mg/m3; TWA 5 mg/m3
Stability Stability Stable, but may be moisture sensitive.
InChI InChI=1S/Co.O
InChIKey IVMYJDGYRUAWML-UHFFFAOYSA-N
SMILES O=[Co]
CAS DataBase Reference 1307-96-6(CAS DataBase Reference)
FDA 21 CFR 582.80
EWG's Food Scores 5
FDA UNII V9X9644V7Q
Proposition 65 List Cobalt (II) Oxide
NIST Chemistry Reference Cobalt monoxide(1307-96-6)
EPA Substance Registry System Cobalt(II) oxide (1307-96-6)
UNSPSC Code 12352303
NACRES NA.23

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.4263	0.4263	0.4263	90	90	90	0.0775

Safety

Hazard Codes :Xn,N,T+
Risk Statements :22-43-50/53-42/43-26
Safety Statements :24-37-60-61-45-36/37-28
RIDADR :UN 3288 6.1/PG 3
WGK Germany :3
RTECS :GG2800000
TSCA :Yes
HazardClass :6.1(b)
PackingGroup :III
HS Code :28220000
Hazardous Substances Data :1307-96-6(Hazardous Substances Data)
Toxicity :LD50 orally in rats: 1.70 g/kg (Smyth)

NFPA 704:

	0
2		0

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal wordDanger
Hazard statements H301-H317-H330-H334-H350i-H360F-H410
Precautionary statements P202-P260-P273-P280-P302+P352-P304+P340+P310

Cobalt oxide Price More Price(22)

Brand: Sigma-Aldrich(India)
Product number: 529443
Product name : Cobalt(II) oxide
Purity: 99.99% trace metals basis
Packaging: 5G
Price: ₹22007.23
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 529443
Product name : Cobalt(II) oxide
Purity: 99.99% trace metals basis
Packaging: 25G
Price: ₹53800.25
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich
Product number: 343153
Product name : Cobalt(II) oxide
Purity: ?325?mesh
Packaging: 10G
Price: ₹7523.38
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich
Product number: 343153
Product name : Cobalt(II) oxide
Purity: ?325?mesh
Packaging: 10G
Price: ₹7523.38
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 343153
Product name : Cobalt(II) oxide
Purity: ?325?mesh
Packaging: 10G
Price: ₹7523.38
Updated: 2022/06/14
Buy: Buy

Cobalt oxide Chemical Properties,Usage,Production

Cobalt oxides Cobalt oxides have three oxidation states, namely: (i) cobaltous oxide (cobalt monoxide or cobalt [II] oxide) with CoO chemical formula, (ii) cobaltic oxide (cobalt [III] oxide) with Co2O3 chemical formula and (iii) cobaltosic oxide (cobalt [II, III] oxide) with Co3O4 chemical formula, which is an antiferromagnetic material. The first and the last oxidation states have a cubic crystal structure.
Cobalt oxide is used in pigments for ceramics, in glass coloring and decolorization, as oxidation catalyst for drying oils, and fast-drying paints and varnishes, in preparation of cobalt-metal catalysts, and cobalt powder for binder in sintered tungsten carbide; in semiconductors.
Uses Cobalt(II) oxide is used as a pigment for ceramics and paints; for drying paints, varnishes and oils; for coloring glass; as a catalyst; and for preparation of other cobalt salts. The commercial product is a mixture of cobalt oxides.
Preparation Cobalt(II) oxide is prepared by heating cobalt(II) carbonate, CoCO3, cobalt(III) oxide, Co2O3 or tricobalt tetroxide, Co3O4, at high temperatures in a neutral or slightly reducing atmosphere:
CoCO3 → CoO + CO2
Toxicity Cobalt(II) oxide is moderately toxic by ingestion and subcutaneous and intratracheal routes.
LD50 oral (rat): 202 mg/kg
Description This is obtained as an olive-green powder by heating the metal in air or steam or by thermal decomposition of the hydroxide, carbonate or nitrate. It has the sodium chloride lattice and is antiferromagnetic below 292°K. When heated in oxygen above 400° the black oxide Co3O4 is obtained. This oxide is isomorphous with magnetite Fe3O4, and has tetrahedrally surrounded cobalt(II) ions and octahedrally surrounded cobalt(III) ions. Both these oxides are readily reduced to the metal by heating in hydrogen or with carbon. The reactions of CoO with silica, alumina and zinc oxide are used to form pigments in the ceramic industry.
Chemical Properties Cobalt oxide is a high-valent oxide of cobalt, with a theoretical cobalt content of 71.06% and an oxygen content of 28.94%, which is a black amorphous powder. Cobalt oxide is a kind of unstable and impossible free state compound, usually refers to the cobalt oxide are attached with a certain amount of cobalt tetraoxide when heated cobalt oxide is reduced to cobalt tetraoxide. The theoretical cobalt content of cobalt tetraoxide is 73.43% and the oxygen content is 26.57%, with the appearance of gray-black or black powder.

The cobalt oxide used in batteries is cobalt tetraoxide, which has a spinel structure. It can be used as anode material for lithium-ion batteries and is also the main raw material for the preparation of lithium cobaltate, the cathode material for lithium-ion batteries.
Physical properties The commercial product is usually dark grey powder, but the color may vary from olive geeen to brown depending on particle size; density 6.44 g/cm³, which also may vary between 5.7 to 6.7 g/cm³, depending on the method of preparation; melts around 1,830°C; insoluble in water; soluble in acids and alkalis.
Uses In pigments for ceramics; glass coloring and decolorization; oxidation catalyst for drying oils, fast-drying paints and varnishes; preparation of cobalt-metal catalysts, Co powder for binder in sintered tungsten carbide; in semiconductors.
Uses Cobalt oxide, typically 3.4-4.5%, Molybdenum oxide typically 11.5-14.5% on alumina is used in the preparation of biofuel production by using algae.
Structure and conformation Green cobalt(II) oxide (CoO) has the rock salt (NaCl) structure. It is easily oxidized with water and oxygen to brown cobalt(III) hydroxide (Co(OH)3). At temperatures of 600℃-700℃, CoO oxidizes to the blue cobalt (II,III) oxide (Co3O4), which has a spinel structure. Black cobalt(III) oxide (Co2O3) also exists. Cobalt oxides are antiferromagnetic at low temperature: CoO (Ne′el temperature 18℃/291K) and Co3O4 (Ne′el temperature: 2233℃/40K), which is analogous to magnetite (Fe3O4), with a mixture of 12 and 13 oxidation states.