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266264

Sigma-Aldrich

Chromium

powder, 99.5%, −100 mesh

Synonym(s):

Cd

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About This Item

Empirical Formula (Hill Notation):
Cr
CAS Number:
Molecular Weight:
52.00
EC Number:
MDL number:
UNSPSC Code:
12161600
PubChem Substance ID:
NACRES:
NA.22

Assay

99.5%

form

powder

reaction suitability

core: chromium
reagent type: catalyst

resistivity

12.7 μΩ-cm, 20°C

particle size

−100 mesh

bp

2672 °C (lit.)

mp

1857 °C (lit.)

density

7.14 g/mL at 25 °C (lit.)

SMILES string

[Cr]

InChI

1S/Cr

InChI key

VYZAMTAEIAYCRO-UHFFFAOYSA-N

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Application

Chromium powder can be used in the microwave assisted synthesis of a bis(toluene)chromium boron complex, [Cr(η-C6H5CH3)2]+ (BPh4)-. It can also be used in the solid-state synthesis of chromium sulfide.

Storage Class Code

11 - Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Synthetic reactions using metal powders under microwave irradiation.
Whittaker A G and Mingos D M P
J. Chem. Soc., Dalton Trans., 21, 3967-3970 (2002)
Microwave-assisted solid-state reactions involving metal powders.
GavinaWhittaker A and Michael P aMingos D
J. Chem. Soc., Dalton Trans., 12, 2073-2079 (1995)
J A J Vanoirbeek et al.
Journal of toxicology and environmental health. Part A, 66(4), 393-409 (2003-01-30)
Chromium-based catalysts are used for the synthesis of polyethylene, but little is known about the hazard and biomonitoring possibilities of this type of chromium for workers who may be occupationally exposed to such compounds. Therefore, the bioavailability and toxicokinetics of
B Seifert et al.
Journal of exposure analysis and environmental epidemiology, 10(2), 103-114 (2000-05-03)
The German Environmental Survey (GerES) is a large-scale population study which has repeatedly been carried out in Germany. GerES I was conducted in 1985/1986 followed by GerES IIa in 1990/1991 (West Germany) and GerES IIb in 1991/1992 (East Germany). GerES
Carola Lidén et al.
Contact dermatitis, 54(5), 233-238 (2006-05-13)
There is a great need to accurately assess skin exposure to contact allergens. We have developed a technique for assessment of skin exposure to nickel, chromium and cobalt using acid wipe sampling by cellulose wipes with 1% nitric acid. Chemical

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