Osmium Ring



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Product Code Product Request Quote
OS-M-02-RNG (2N) 99% Osmium Rings Request
OS-M-03-RNG (3N) 99.9% Osmium Rings Request
OS-M-04-RNG (4N) 99.99% Osmium Rings Request
OS-M-05-RNG (5N) 99.999% Osmium Rings Request


Osmium RingOsmium Rings can be customized in width, thickness, and ring diameter. Osmium rings may have a custom shape hole and may be open or closed. American Elements specializes in producing high purity uniform shaped Osmium rings. American Elements offers custom rings with annealed or hard tempers and will meet most of the common Milspec or ASTM standards. Osmium rings are hollow, circular pieces of metal and can be produced in custom sizes. In addition to standard alloys, American Elements also specializes in corrosiun resistant alloys, high temperature applications, and custom shapes and forms including custom inside and outside dimensions and threading. American Elements also produces Osmium as rod, ingot, powder, pieces, disc, granules, wire, and in compound forms, such as oxide. Osmium rings can be used as components in several applications.

Chemical Identifiers

Formula Os
CAS 7440-04-2
Pubchem CID 23937
MDL MFCD00011147
EC No. 231-114-0
Beilstein Registry No. N/A
InchI Identifier InChI=1S/Os


Molecular Weight 190.23
Appearance Yellow Crystalline Solid
Melting Point 3045 °C
Boiling Point 5027 °C
Density 22.57 g/cm3
Tensile Strength N/A
Thermal Conductivity N/A
Electronegativity 2.2 Paulings
Specific Heat 0.03127 Cal/g/K @ 25 °C
Heat of Vaporization 162 K-Cal/gm atom at 5027 °C
Heat of Fusion 7.0 Cal/gm mole

Health & Safety Info  |  MSDS / SDS

Signal Word Danger
Hazard Statements H228-H315-H318-H335
Hazard Codes F,Xi
Risk Codes 11-37/38-41
Safety Statements 16-26-36/37/39
RTECS Number RN1100000
Transport Information UN 3089 4.1/PG 2
WGK Germany nwg
Globally Harmonized System of Classification and Labelling (GHS) N/A

Packaging Specifications

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.

Related Products

OsSee more Osmium products. Osmium (atomic symbol: Os, atomic number: 76) is a Block D, Group 8, Period 6 element with an atomic weight of 190.23. The number of electrons in each of osmium's shells is [2, 8, 18, 32, 14, 2] and its electron configuration is [Xe] 4f14 5d6 6s2. The osmium atom has a radius of 135 pm and a Van der Waals radius of 216 pm. Osmium was discovered and first isolated by Smithson Tennant in 1803. In its elemental form, osmium has a silvery blue cast apperance. Osmium has the highest melting point and the lowest vapor pressure of any of the platinum group of metals it is also the densest naturally ocurring element. Osmium is the least abundant stable element in the earth's crust. It is found in the alloys osmiridium and iridiosmium and as a free element. The origin of the name Osmium comes from the Greek word osme, meaning a smell or odor.


Recent Research & Development for Osmium

  • A Metallacycle Fragmentation Strategy for Vinyl Transfer from Enol Carboxylates to Secondary Alcohol C-H Bonds via Osmium- or Ruthenium-Catalyzed Transfer Hydrogenation. Park BY, Luong T, Sato H, Krische MJ. J Am Chem Soc. 10/5/2015
  • Binding of an organo-osmium(II) anticancer complex to guanine and cytosine on DNA revealed by electron-based dissociations in high resolution Top-Down FT-ICR mass spectrometry. Wootton CA, Sanchez-Cano C, Liu HK, Barrow MP, Sadler PJ, O'Connor PB. Dalton Trans. 10/3/2015
  • Osmium polypyridyl complexes and their applications to dye-sensitized solar cells. Swetha T, Reddy KR, Singh SP. Chem Rec. 9/28/2015
  • Photocurrent generation from thylakoid membranes on osmium-redox-polymer-modified electrodes. Hamidi H, Hasan K, Emek SC, Dilgin Y, Åkerlund HE, Albertsson PÅ, Leech D, Gorton L. ChemSusChem. 9/24/2015
  • Ruthenium(II) and Osmium(II) Vinyl Complexes as Highly Sensitive and Selective Chromogenic and Fluorogenic Probes for the Sensing of Carbon Monoxide in Air. Toscani A, Marín-Hernández C, Moragues ME, Sancenón F, Dingwall P, Brown NJ, Martínez-Máñez R, White AJ, Wilton-Ely JD. Chemistry. 9/24/2015
  • Easy To Synthesize, Robust Organo-osmium Asymmetric Transfer Hydrogenation Catalysts. Coverdale JP, Sanchez-Cano C, Clarkson GJ, Soni R, Wills M, Sadler PJ. Chemistry. 9/23/2015
  • Recognition of fractional non-innocent feature of osmium coordinated 2,2'-biimidazole or 2,2'-bis(4,5-dimethylimidazole) and their interactions with anions. Das A, Mobin SM, Lahiri GK. Dalton Trans. 9/23/2015
  • Osmium and Platinum Decoupling in the Environment: Evidences in Intertidal Sediments (Tagus Estuary, SW Europe). Almécija C, Sharma M, Cobelo-García A, Santos-Echeandía J, Caetano M. Environ Sci Technol. 9/22/2015
  • Recent advances in osmium-catalyzed hydrogenation and dehydrogenation reactions. Chelucci G, Baldino S, Baratta W. Acc Chem Res. 8/26/2015
  • The most incompressible metal osmium at static pressures above 750 gigapascals. Dubrovinsky L, Dubrovinskaia N, Bykova E, Bykov M, Prakapenka V, Prescher C, Glazyrin K, Liermann HP, Hanfland M, Ekholm M, Feng Q, Pourovskii LV, Katsnelson MI, Wills JM, Abrikosov IA. Nature. 8/11/2015

Free Test Sample Program

We recognize many of our customers are purchasing small quantities directly online as trial samples in anticipation of placing a larger future order or multiple orders as a raw material for production. Since our primary business is the production of industrial quantities and/or highly consistent batches which can be used for commercial production and purchased repeatedly in smaller quantity, American Elements offers trial samples at no charge on the following basis. Within 6 months of purchasing materials directly online from us, you have the option to refer back to that order and advise that it is the intention of your company, institution or lab to either purchase a larger quantity, purchase the material in regular intervals or purchase more on some other basis.

We will then evaluate your future needs and assuming the quantity or number of future purchases qualify, we will fully credit your purchase price with the next order. Because of the many variables in the quantity and number of orders you may place, it is impossible to evaluate whether your future order(s) will qualify for this program prior to your placing your next order. Please know American Elements strongly desires to make this free sample program available to you and will make every effort to do so once your next order is placed.