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

Formula CAS No. PubChem SID PubChem CID MDL No. EC No Beilstein
Re. No.
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.

Environment-Hazardous to the aquatic environment        

Chromium Chloride Chromium Fluoride Chromium Acetate Chromium Metal Chromium Acetylacetonate
Chromium Nanoparticles Chromium Oxide Pellets Chromium Sheets Chromium Iron Tantalum Alloy Chromium Pellets
Chromium Oxide Chromium Wire Chromium Sputtering Target Aluminum Chromium Alloy Chromium Powder
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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.

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Production Catalog Available in 36 Countries & Languages

Recent Research & Development for Chromium

  • Hui Zhang, Yong Zou, Zengda Zou, Chuanwei Shi, Effects of chromium addition on microstructure and properties of TiC–VC reinforced Fe-based laser cladding coatings, Journal of Alloys and Compounds, Volume 614, 25 November 2014
  • Fei Wang, Lei Feng, Dongmei Zhang, Qingguo Tang, Dan Feng, A first-principles calculation on electronic structure and optical performance of chromium and nitrogen codoped anatase titanium dioxide, Journal of Alloys and Compounds, Volume 611, 25 October 2014
  • Mansoo Park, Kathleen C. Alexander, Christopher A. Schuh, Diffusion of tungsten in chromium: Experiments and atomistic modeling, Journal of Alloys and Compounds, Volume 611, 25 October 2014
  • Mansoo Park, Kathleen C. Alexander, Christopher A. Schuh, Diffusion of tungsten in chromium: Experiments and atomistic modeling, Journal of Alloys and Compounds, Volume 611, 25 October 2014
  • Feixiang Wu, Xinhai Li, Zhixing Wang, Huajun Guo, Synthesis of chromium-doped lithium titanate microspheres as high-performance anode material for lithium ion batteries, Ceramics International, Volume 40, Issue 8, Part B, September 2014
  • S. Santhosh, N. Lakshminarasimhan, Impedance spectroscopic studies, dielectric properties and microstructure of rutile type chromium niobate CrNbO4, Ceramics International, Volume 40, Issue 8, Part A, September 2014
  • Xian-Ji Guo, Shuo-Feng Wang, Shu-Min Liu, Lei Zhao, Tao Yu, Wen-Feng Duan, Xiang-Qian Xu, Processing of chromium oxide-pillared layered HMWO6 (M = Nb, Ta) and their catalytic performances for photodegradation of rhodamine B, Inorganica Chimica Acta, Volume 421, 1 September 2014
  • S. Yusub, D. Krishna Rao, The role of chromium ions on dielectric and spectroscopic properties of Li2O–PbO–B2O3–P2O5 glasses, Journal of Non-Crystalline Solids, Volumes 398–399, 1 September 2014
  • R. Idczak, K. Idczak, R. Konieczny, Oxidation and surface segregation of chromium in Fe–Cr alloys studied by Mössbauer and X-ray photoelectron spectroscopy, Journal of Nuclear Materials, Volume 452, Issues 1–3, September 2014
  • David A. McKeown, Hao Gan, Ian L. Pegg, Raman and X-ray absorption spectroscopy studies of chromium–phosphorus interactions in high-bismuth high-level waste glasses, Journal of Nuclear Materials, Volume 452, Issues 1–3, September 2014
  • I.N. Mastorakos, H.M. Zbib, Erratum to “A multiscale approach to study the effect of chromium and nickel concentration in the hardening of iron alloys” [J. Nucl. Mater. 449 (2014) 101–110], Journal of Nuclear Materials, Volume 452, Issues 1–3, September 2014
  • Dirong Gong, Xiaoyu Jia, Baolin Wang, Xuequan Zhang, Kuo-Wei Huang, Trans-1,4 selective polymerization of 1,3-butadiene with symmetry pincer chromium complexes activated by MMAO, Journal of Organometallic Chemistry, Volume 766, 1 September 2014
  • Jing-He Yang, Duo Yang, Yamin Li, Graphene supported chromium carbide material synthesized from Cr-based MOF/graphene oxide composites, Materials Letters, Volume 130, 1 September 2014
  • P. Srinivasa Rao, P. Ramesh Babu, R. Vijay, T. Narendrudu, N. Veeraiah, D. Krishna Rao, Spectroscopic and dielectric response of zinc bismuth phosphate glasses as a function of chromium content, Materials Research Bulletin, Volume 57, September 2014
  • Eunjoo Park, Shunsuke Taniguchi, Takeshi Daio, Jyh-Tyng Chou, Kazunari Sasaki, Comparison of chromium poisoning among solid oxide fuel cell cathode materials, Solid State Ionics, Volume 262, 1 September 2014
  • Paranjayee Mandal, Arutiun P. Ehiasarian, Papken Eh. Hovsepian, Lubricated sliding wear mechanism of chromium-doped graphite-like carbon coating, Tribology International, Volume 77, September 2014
  • Fatemeh Behrouznejad, Nima Taghavinia, High-performance/low-temperature-processed dye solar cell counter electrodes based on chromium substrates with cube-like morphology, Journal of Power Sources, Volume 260, 15 August 2014
  • Rodolfo F.K. Gunnewiek, Camilla F. Mendes, Ruth H.G.A. Kiminami, Synthesis of Cr2O3 nanoparticles via thermal decomposition of polyacrylate/chromium complex, Materials Letters, Volume 129, 15 August 2014
  • Rodrigo S. Vieira, Emerson Meneghetti, Paula Baroni, Eric Guibal, Victor M. González de la Cruz, Alfonso Caballero, Enrique Rodríguez-Castellón, Marisa M. Beppu, Chromium removal on chitosan-based sorbents – An EXAFS/XANES investigation of mechanism, Materials Chemistry and Physics, Volume 146, Issue 3, 14 August 2014
  • Priyanka Desai, D.D. Patel, A.R. Jani, Electrical transport properties of semiconducting chromium molybdenum diselenide single crystals, Materials Science in Semiconductor Processing, Volume 24, August 2014