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CAS No 7440-47-3 , chromium Search by region : Germany

  • Name: chromium
  • Synonyms: 7440-47-3; Chrome [French]; Chrom; Chromium compounds; metal; Chromium;Chrome; Chrom [German];chromium; Chromium metal;
  • CAS Registry Number:
  • Transport: UN 2924 3/PG 2
  • Melting Point: 1890 ºC
  • Boiling Point: 2200 ºC
  • Water Solubility: Insoluble in water
  • Safety Statements: R40
  • Hazard Symbols: Xn: Harmful;
  • EINECS: 231-157-5
  • Molecular Weight: 51.9961
  • InchiKey: VYZAMTAEIAYCRO-UHFFFAOYSA-N
  • InChI: InChI=1S/Cr
  • Risk Statements: S36/37;S45
  • Molecular Formula: Cr
  • Molecular Structure:CAS No:7440-47-3 chromium

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7440-47-3 CHROMIUM

  • Germany Cfm Oskar Tropitzsch [Manufacturer]
  • Tel: +49-9231-9619-0
  • Fax: +49-9231-9619-60
  • Address: Cfm Oskar Tropitzsch
    Waldershofer Str. 49-51
    95615 Marktredwitz
    Germany null,nullGermany
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7440-47-3 Chromium Metal

  • Germany Intatrade Chemicals GmbH [Manufacturer]
  • Tel: +49 3493/605464
  • Fax: +49 3493/605470
  • Address: Intatrade Chemicals GmbH
    Vierzoner Strasse 14
    D-06749 Bitterfeld, Germany null,nullGermany
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7440-47-3 Chromium

  • Chromium
  • Germany Fox Chemicals [Manufacturer]
  • Tel: +49-7240-927151
  • Fax: +49-7240-927150
  • Address: Bockstalstr. 10A76327 Pfinztal-Kst.GERMANY Pfinztal-Kst.,nullGermany
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7440-47-3 (0370) CHROMIUM

  • Germany Fox Chemicals GmbH [Manufacturer]
  • Tel: +49.7240.927151/ +49.160.95781845 (Mobile)
  • Fax: +49.7240.927150
  • Address: Fox Chemicals GmbH
    Bockstalstr.10 A
    D-76327 Pfinztal-Germany null,nullGermany
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7440-47-3 Chromium powder, 30 nm, 99%

  • Chromium powder, 30 nm, 99%
  • Germany IoLiTec GmbH & Co. KG [Manufacturer]
  • Tel: 0049 7666 9129591
  • Fax: 0049 7666 9129345
  • Address: Ferdinand-Porsche-Stra?e 5/179211 DenzlingenGERMANY Denzlingen,nullGermany
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7440-47-3 Chromium; 99.995%, powder, -300 micron

  • Chromium; 99.995%, powder, -300 micron
  • 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
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7440-47-3 Chromium metal

  • Chromium metal
  • Germany CHEMOS GmbH [Manufacturer]
  • Tel: 0049 9402/9336 0
  • Fax: 0049 9402/9336 13
  • Address: CHEMOS GmbH
    Werner-von-Siemensstr. 3
    93128 Regenstauf
    Germany null,nullGermany
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References of chromium
Title: Chromium
CAS Registry Number: 7440-47-3
Literature References: Cr; at. wt 51.9961; at. no. 24; valences 1-6. Group VIB (6). Four naturally occurring isotopes: 50 (4.31%); 52 (83.76%); 53 (9.55%); 54 (2.38%). Artificial radioactive isotopes: 45-49; 51; 55-57; longest-lived isotope is 51Cr (T? 27.704 days) prepd by (n,g) reaction from 50Cr. Abundance in earth's crust: 122 ppm. Isoln from crocoite (PbCrO4): L. N. Vauquelin, J. Mines 6, ser. 1, 737 (1787); idem, Ann. 70, 70 (1809). Commercial sources obtained from chrome ore, chromite (FeO.Cr2O3). Reviews of chromium, its alloys and compds: ACS Monograph Series no. 132, entitled "Chromium," M. J. Udy, Ed. (Reinhold, New York, 1956) vol. 1, 433 pp; vol. 2, 402 pp; C. L. Rollinson, "Chromium, Molybdenum and Tungsten" in Comprehensive Inorganic Chemistry vol. 3, J. C. Bailar, Jr. et al., Eds. (Pergamon Press, Oxford, 1973) pp 623-700; Chemistry of the Elements, N. N. Greenwood, A. Earnshaw, Eds. (Pergamon Press, New York, 1984) pp 1167-1210; J. H. Westbrook in Kirk-Othmer Encyclopedia of Chemical Technology vol. 6 (Wiley-Interscience, New York, 4th ed., 1993) pp 228-263; B. J. Page, G. W. Loar, ibid. pp 263-311. Review of biological function of the Cr(III) ion as essential trace element: Mertz, Physiol. Rev. 49, 163-239 (1969). Review of carcinogenic risk: IARC Monographs 2, 100-125 (1973); ibid. 23, 205-323 (1980); of metabolism and toxicity: M. D. Cohen et al., Crit. Rev. Toxicol. 23, 255-281 (1993); of toxicology and human exposure: Toxicological Profile for Chromium (PB2000-108022, 2000) 461 pp. Books: Chromium: Metabolism and Toxicity, D. Burrows, Ed. (CRC Press, Boca Raton, 1983) 172 pp; Chromium in the Natural and Human Environments, J. O. Nriagu, E. Nieboer, Eds. (John Wiley & Sons, New York, 1988) 571 pp.
Properties: Steel-gray, lustrous metal; body-centered cubic structure; hard as corundum and less fusible than platinum. Takes a high polish. mp 1903 ±10°. bp 2642°. d20 7.14. Heat capacity (25°): 5.58 cal/mol/deg C. Heat of fusion: 3.5 kcal/mol; heat of vaporization: 81.7 kcal/mol (at bp); heat of sublimation (25°): 94.8 kcal/mol (Rollinson). Also reported as mp 1875°. bp 2680°. d20 7.19. Specific heat (25° C): 23.9 J/mol/deg K. Heat of fusion: 14.6 kJ/mol; heat of vaporization: 305 kJ/mol (at bp) (Westbrook). Resistant to common corroding agents, highly acid resistant. Reacts with dil HCl, H2SO4; not with HNO3. Resists atmospheric attack at ambient temperatures.
Melting point: mp 1903 ±10°; mp 1875°
Boiling point: bp 2642°; bp 2680°
Density: d20 7.14; d20 7.19
CAUTION: Potential symptom of overexposure to chromium metal by inhalation is histologic fibrosis of the lungs. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 72. Chromic acid and chromate salts are irritating to exposed tissues. Toxic effects due to overexposure may include dermatitis, skin ulcers; nasal inflammation, perforation of nasal septum; cancer of the lungs, nasal cavity and paranasal sinus. See Patty's Industrial Hygiene and Toxicology vol. 2C, G. D. Clayton, F. E. Clayton, Eds. (John Wiley & Sons, New York, 4th ed., 1994) p 1973-1985. Chromium hexavalent compounds are listed as known human carcinogens: Report on Carcinogens, Eleventh Edition (PB2005-104914, 2004) p III-63.
Use: In manuf of chrome-steel or chrome-nickel-steel alloys (stainless steel), nonferrous alloys, heat resistant bricks for refractory furnaces. To greatly increase strength, hardness and resistance of metals to abrasion, corrosion and oxidation. For chrome plating of other metals; leather tanning; as pigment and mordant; wood preservative. Use of 51Cr as diagnostic aid see sodium chromate(VI).