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697745

Sigma-Aldrich

Cobalt

Carbon coated magnetic, nanopowder, <50 nm particle size (TEM), ≥99%

Synonym(s):

Cobalt element, Cobalt-59

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About This Item

Empirical Formula (Hill Notation):
Co
CAS Number:
7440-48-4
Molecular Weight:
58.93
MDL number:
MFCD00010935
UNSPSC Code:
12352302
PubChem Substance ID:
329761949
NACRES:
NA.23

material

carbon

Quality Level

100

Assay

≥99%

form

nanopowder

composition

Carbon content, <8 wt. %

magnetization

>150 emu/g, Mass saturation

resistivity

6.24 μΩ-cm, 20°C

surface area

>15 m2/g

particle size

<50 nm (TEM)

bp

2900 °C (lit.)

density

8.9 g/mL at 25 °C (lit.)

application(s)

battery manufacturing

SMILES string

[Co]

InChI

1S/Co

InChI key

GUTLYIVDDKVIGB-UHFFFAOYSA-N

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Application

Chemical Synthesis of Monodisperse Magnetic Nanoparticles
Air- and thermally-stable magnetic carbon-coated cobalt nanoparticles (nanomagnets). Carbon shell consists of approximately three graphitic layers and can be chemically functionalized using e.g. diazotization reactions.

Signal Word

Danger

Hazard Classifications

Acute Tox. 1 Inhalation - Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B - Eye Irrit. 2 - Muta. 2 - Repr. 1B - Resp. Sens. 1 - Skin Sens. 1 - STOT RE 2

Storage Class Code

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

PRTR

Class I Designated Chemical Substances

FSL

Group 2: Flammable solids
Metal powder
Hazardous rank II
1st combustible solid

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

697745-500MG:4548173314112
697745-VAR:
697745-BULK:

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Certificates of Analysis (COA)

Lot/Batch Number
MKCN2148
MKCL5254
MKCH2748
MKCD8588
MKCB1778V

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Alexander Schätz et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 14(27), 8262-8266 (2008-07-31)
TEMPO was grafted on graphene-coated nanobeads with a magnetic cobalt core by using a general applicable "click"-chemistry protocol. The new heterogeneous CoNP-TEMPO emerged as a highly active catalyst for the chemoselective oxidation of primary and secondary alcohols using bleach as
Chun Ghee Tan et al.
Chemical communications (Cambridge, England), (36), 4297-4299 (2008-09-20)
To develop magnetic nanomaterials applicable to organic synthesis, the Suzuki cross-coupling method was adapted to attach a range of functional groups to carbon-coated core-shell materials via commercially-available substituted arylboronic acids.
Luechinger, N.A.; Booth, N.; Heness, G.; Bandyopadhyay, S.; Grass, R.N.; Stark W.J.
Advanced Materials, 20, 3044-3044 (2008)
Covalently functionalized cobalt nanoparticles as a platform for magnetic separations in organic synthesis.
Robert N Grass et al.
Angewandte Chemie (International ed. in English), 46(26), 4909-4912 (2007-05-23)
D W Su et al.
Journal of nanoscience and nanotechnology, 13(5), 3354-3359 (2013-07-19)
Highly ordered mesoporous Co3O4 nanostructures were prepared using SBA-15 silica as hard templates. The mesoporous structures were characterized by X-ray diffraction, high resolution transmission electron microscopy, and N2 adsorption/desorption isotherm analysis. The results demonstrated that the as-prepared mesoporous Co3O4 has
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