Chromium Circle

High Purity Cr Circles
CAS 7440-47-3


Product Product Code Order or Specifications
(2N) 99% Chromium Circle CR-M-02-CRCL Contact American Elements
(3N) 99.9% Chromium Circle CR-M-03-CRCL Contact American Elements
(4N) 99.99% Chromium Circle CR-M-04-CRCL Contact American Elements
(5N) 99.999% Chromium Circle CR-M-05-CRCL Contact American Elements

CHEMICAL
IDENTIFIER
Formula CAS No. PubChem SID PubChem CID MDL No. EC No Beilstein
Re. No.
SMILES
Identifier
InChI
Identifier
InChI
Key
Cr 7440-47-3 24863343 23976 MFCD00010944 231-157-5 N/A [Cr] InChI=1S/Cr VYZAMTAEIAYCRO-UHFFFAOYSA-N

PROPERTIES Mol. Wt. Appearance Density Tensile Strength Melting Point Boiling Point Thermal Conductivity Electrical Resistivity Eletronegativity Specific Heat Heat of Vaporization Heat of Fusion MSDS
52.00 Silvery 7.18 gm/cc N/A 1857°C 2672°C 0.939 W/cm/K @ 298.2 K 12.9 microhm-cm @ 0°C 1.6 Paulings 0.107 Cal/g/K @ 25°C 72.97 K-cal/gm atom at 2672°C 3.66 Cal/gm mole Safety Data Sheet

American Elements specializes in producing high purity Chromium Circles with the highest possible densityHigh Purity (99.99%) Metallic Circleand smallest possible average grain sizes for use in semiconductor, chemical vapor deposition (CVD) and physical vapor deposition (PVD) display and optical applications. Our standard Circle sizes range from 1" to 8" in diameter and from 2mm to 1/2" thick. We can also provide Circles outside this range. Materials are produced using crystallization, solid state and other ultra high purification processes such as sublimation. American Elements specializes in producing custom compositions for commercial and research applications and for new proprietary technologies. American Elements also casts any of the rare earth metals and most other advanced materials into rod, bar or plate form, as well as other machined shapes and through other processes such as nanoparticles (See also application discussion at Nanotechnology Information and at Quantum Dots) and in the form of solutions and organometallics. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. See safety data and research below and pricing/lead time above. We also produce Chromium as rod, pellets, powder, pieces, granules, ingot, wire, and in compound forms, such as oxide. Other shapes are available by request.

Chromium (Cr) atomic and molecular weight, atomic number and elemental symbolChromium (atomic symbol: Cr, atomic number: 24) is a Block D, Group 6, Period 4 element with an atomic weight of 51.9961. Chromium Bohr ModelThe number of electrons in each of Chromium's shells is 2, 8, 13, 1 and its electron configuration is [Ar] 3d5 4s1. Chromium was first discovered by Louis Nicolas Vauquelin in 1797. It was first isolated in 1798, also by Louis Nicolas Vauquelin. The chromium atom has a radius of 128 pm and a Van der Waals radius of 189 pm. In its elemental form, chromium has a lustrous steel-gray appearance. Elemental ChromiumChromium is the hardest metal element in the periodic table and the only element that exhibits antiferromagnetic ordering at room temperature, above which it tranforms into a paramagnetic solid. The most common source of chromium is chromite ore (FeCr2O4). Due to its various colorful compounds, Chromium was named after the Greek word 'chroma' meaning color. For more information on chromium, including properties, safety data, research, and American Elements' catalog of chromium products, visit the Chromium Information Center.


HEALTH, SAFETY & TRANSPORTATION INFORMATION
Warning
H400
N/A
N/A
N/A
GB4200000
N/A
3
Environment-Hazardous to the aquatic environment        

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PACKAGING SPECIFICATIONS FOR BULK & RESEARCH QUANTITIES
Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Material Safety Data Sheet (MSDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes.


Have a Question? Ask a Chemical Engineer or Material Scientist
Request an MSDS or Certificate of Analysis





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Recent Research & Development for Chromium

  • Use of modified wheat bran for the removal of chromium(VI) from aqueous solutions. Kaya K, Pehlivan E, Schmidt C, Bahadir M. Food Chem. 2014.
  • Reduction of hexavalent chromium by digested oat bran proteins. Tsopmo A, Gao Q, Baakdah MM. Food Chem. 2014 Jun.
  • Speciation of chromium and its distribution in tea leaves and tea infusion using titanium dioxide nanotubes packed microcolumn coupled with inductively coupled plasma mass spectrometry. Food Chem. 2014 | first author:Chen S
  • Nanoscale Zero-Valent Iron (nZVI) assembled on magnetic Fe3O4/graphene for Chromium (VI) removal from aqueous solution. J Colloid Interface Sci. 2014 | first author:Lv X
  • Bacterial and osteoblast behavior on titanium, cobalt-chromium alloy and stainless steel treated with alkali and heat: A comparative study for potential orthopedic applications. J Colloid Interface Sci. 2014 | first author:Hu X
  • Acute Toxicity by Water Containing Hexavalent or Trivalent Chromium in Native Brazilian Fish, Piaractus mesopotamicus: Anatomopathological Alterations and Mortality. Bull Environ Contam Toxicol. 2014 | first author:Castro MP
  • Antioxidant effect of propolis against exposure to chromium in Cyprinus carpio. Environ Toxicol. 2014 create date:2011/11/05 | first author:Yonar ME
  • Acute and chronic toxicity of chromium and cadmium to the tropical cladoceran pseudosida ramosa and the implications for ecotoxicological studies. Environ Toxicol. 2014 | first author:Freitas EC
  • Formation of oxo-centered trinuclear chromium carboxylate complexes and hydrolysis of Cr3 as established by paramagnetic (2)H NMR spectroscopy. J Inorg Biochem. 2014 | first author:Royer AC
  • Chromium stress response effect on signal transduction and expression of signaling genes in rice. Physiol Plant. 2014 create date:2013/09/17 | first author:Trinh NN
  • Enhanced adsorption of chromium onto activated carbon by microwave-assisted H3PO4 mixed with Fe/Al/Mn activation. J Hazard Mater. 2014 create date:2013/12/24 | first author:Sun Y
  • Highly sensitive detection of chromium (III) ions by resonance Rayleigh scattering enhanced by gold nanoparticles. Spectrochim Acta A Mol Biomol Spectrosc. 2014 | first author:Chen M
  • A new heteroleptic oxalate-based compound: poly[[2-(aminomethyl)pyridine]di-μ6-oxalato-chromium(III)potassium(I)]. Acta Crystallogr C Struct Chem. 2014 create date:2014/01/09 | first author:Kenfack Tsobnang P.
  • Chromium(III) complexation to natural organic matter: mechanisms and modeling. Environ Sci Technol. 2014 | first author:Gustafsson JP
  • Supplementary Chromium(III) Propionate Complex Does Not Protect Against Insulin Resistance in High-Fat-Fed Rats. Biol Trace Elem Res. 2014 create date:2014/01/15 | first author:Król E
  • Kinetics for adsorptive removal of chromium(VI) from aqueous solutions by ferri hydroxide/oxohydroxides. Ecotoxicology. 2014 | first author:Yu XZ
  • Assessment of chromium efficacy on germination, root elongation, and coleoptile growth of wheat (Triticum aestivum L.) at different growth periods. Environ Monit Assess. 2014 create date:2014/01/15 | first author:Dotaniya ML
  • High Concentrations of Hexavalent Chromium in Drinking Water Alter Iron Homeostasis in F344 Rats and B6C3F1 Mice. Food Chem Toxicol. 2014 create date:2014/01/15 | first author:Suh M
  • Phytoremediation Potential and Nutrient Status of Barringtonia acutangula Gaerth. Tree Seedlings Grown Under Different Chromium (CrVI) Treatments. Biol Trace Elem Res. 2014 create date:2014/01/09 | first author:Kumar D
  • Sensitive and selective electrochemical detection of chromium(vi) based on gold nanoparticle-decorated titania nanotube arrays. Jin W, Wu G, Chen A. Analyst. 2014.