Home > Name List By o > osmium Germany

CAS No 7440-04-2 , osmium Search by region : Germany

  • Name: osmium
  • Synonyms: 7440-04-2; (193os)osmium;Metallic osmium; (189os)osmium; HSDB 7329; elemental; Osmium; EINECS 231-114-0;osmium; OSMIUM ION;
  • CAS Registry Number:
  • Transport: UN 3089 4.1/PG 2
  • Melting Point: 3045 °C(lit.)
  • Boiling Point: 5027 °C(lit.)
  • Density: 22,48 g/cm3
  • Safety Statements: Poison by intravenous route. An irritant to eyes and mucous membranes. The principal effects of exposure are ocular disturbances and an asthmatic condition caused by inhalation. Furthermore, it causes dermatitis and ulceration of the skin upon contact. When osmium is heated, it gives off a pungent, poisonous fume of osmium tetroxide. One case of osmium poisoning reported in the literature resulted from the inhalation of osmium, which gave rise to a capillary bronchitis and dermatitis. The tetroxide vapor has a pronounced and nauseating odor that should be taken as a warning of a possibly toxic concentration in the atmosphere, and personnel should immediately move to an area of fresh air. The metal itself is not highly toxic. Flammable in the form of dust when exposed to heat or flame. Slight explosion hazard in the form of dust when exposed to heat or flame. Violent reaction or ignition with chlorine trichloride or oxygen difluoride. Ignites when heated to 100°C with fluorine. Incandescent reaction in phosphorus vapor. When heated to decomposition it emits toxic fumes of OsO4. See also OSMIUM TETROXIDE.
  • Hazard Symbols: Highly toxic; irritant to skin.
  • EINECS: 231-114-0
  • Molecular Weight: 190.23
  • InchiKey: SYQBFIAQOQZEGI-UHFFFAOYSA-N
  • InChI: InChI=1S/Os
  • Risk Statements: 11-37/38-41-36/38
  • Molecular Formula: Os
  • Molecular Structure:CAS No:7440-04-2 osmium

Related products

Select to

7440-04-2 OSMIUM POWDER; 99.8%, 2N8

  • Germany ABCR GmbH & Co KG [Manufacturer]
  • Tel: +49 721 95061-0
  • Fax: +49 721 95061-80
  • Address: Im Schlehert 10
    76187 Karlsruhe
    Germany null,nullGermany
Contact Supplier

Select to

1/1
References of osmium
Title: Osmium
CAS Registry Number: 7440-04-2
Literature References: Os; at. wt 190.23; at. no. 76; valences 1-8; most common states 3, 4, 6. Group VIII (8). Seven naturally occurring isotopes: 184 (0.02%); 186 (1.6%); 187 (1.6%); 188 (13.3%); 189 (16.1%); 190 (26.4%); 192 (41.0%); artificial radioactive isotopes: 181-183; 185; 191; 193-195. Occurrence in earth's crust ~0.001 ppm. Found in the mineral osmiridium and in all platinum ores. Discovered by Tennant in 1804. Prepn: Berzelius et al., cited by Mellor, A Comprehensive Treatise on Inorganic and Theoretical Chemistry 15, 687 (1936). Reviews of prepn, properties and chemistry of osmium and other platinum metals: Gilchrist, Chem. Rev. 32, 277-372 (1943); Beamish et al. in Rare Metals Handbook, C. A. Hampel, Ed. (Reinhold, New York, 1956) pp 291-328; Griffith, Q. Rev. Chem. Soc. 19, 254-273 (1965); idem, The Chemistry of the Rarer Platinum Metals (John Wiley, New York, 1967) pp 1-125; Livingstone in Comprehensive Inorganic Chemistry vol. 3, J. C. Bailar, Jr. et al., Eds. (Pergamon Press, Oxford, 1973) pp 1163-1189, 1209-1233.
Properties: Bluish-white, lustrous metal; close-packed hexagonal structure. d420 22.61; long believed to be the densest element; x-ray data show it to be slightly less dense than iridium. mp ~2700°. bp ~5500°. Sp heat (0°) 0.0309 cal/g/°C. Hardness 7.0 on Mohs' scale. Electrical resistivity (0°) 8.12 mohms-cm. Stable in air in the cold; when finely divided, is slowly oxidized by air even at ordinary temp to form tetroxide. Attacked by fluorine above 100°; by dry chlorine on heating; not attacked by bromine or iodine. Attacked by aqua regia, by oxidizing acids over a long period of time; barely affected by HCl, H2SO4. Burns in vapor of phosphorus to form a phosphide, in vapor of sulfur to form a sulfide. Attacked by molten alkali hydrosulfates, by potassium hydroxide and oxidizing agents. Finely divided osmium absorbs a considerable amount of hydrogen.
Melting point: mp ~2700°
Boiling point: bp ~5500°
Density: d420 22.61
 
Derivative Type: Osmarins
Literature References: High-molecular weight polymers of carbohydrate and osmium. Potential use in the treatment of arthritis: Chem. Eng. News 60, 8 (April 5, 1982).
 
Use: As alloy with iridium for pen points and fine machine bearings; as catalyst in the synthesis of ammonia; as catalyst in hydrogenation of organic compounds.