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CAS No 7440-25-7 , tantalum

  • Name: tantalum
  • Synonyms: metal and oxide dust;Tantalum; tantale; HSDB 2533; Tantalum; elemental; EINECS 231-135-5; metal;tantalum; 7440-25-7; Tantalum-181;
  • CAS Registry Number:
  • Transport: UN 3089 4.1/PG 2
  • Flash Point: °C
  • Density: 16,6 g/cm3
  • Safety Statements: 11-36/37/38-20/21/22,
  • Hazard Symbols: F,Xi,Xn:;
  • Flash Point: °C
  • EINECS: 231-135-5
  • Molecular Weight: 180.94788
  • InchiKey: GUVRBAGPIYLISA-UHFFFAOYSA-N
  • InChI: InChI=1S/Ta
  • Risk Statements: 16-26-33-36/37/39-36,
  • Molecular Formula: Ta
  • Molecular Structure:CAS No:7440-25-7 tantalum
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7440-25-7 TANTALUM FOIL ASTM B 708, GRADE R05200

  • Germany ABCR GmbH & Co KG [Manufacturer]
  • Tel: +49 721 95061-0
  • Fax: +49 721 95061-80
  • Address: Im Schlehert 10
    76187 Karlsruhe
    Germany ,Germany
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7440-25-7 SS-334-2X1/4 TANTALUM

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7440-25-7 TANTALUM POWDER, 99.99%

  • United States MV Laboratories, Inc. [Manufacturer]
  • Tel: 908-788-6906
  • Fax: 908-788-1746
  • Address: MV Laboratories, Inc.
    843 Route 12 West, Suite B17
    Frenchtown, NJ 08825 ,United States
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7440-25-7 Tantalum

  • China Beijing Cerametek Materials Co. Ltd. [Manufacturer]
  • Tel: +86-10-6156.6641
  • Fax: +86-10-6156.1674
  • Address: Beijing Cerametek Materials Co. Ltd.
    2-E051, BPE, W. NongLin Rd.,
    FangShan, Beijing, 102400,
    China ,China
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7440-25-7 Tantalum

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7440-25-7 Tantalum foil

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7440-25-7 TANTALUM

  • United States ATLANTIC EQUIPMENT ENGINEERS [Manufacturer]
  • Tel: 800-486-2436/ 201-384-5606
  • Fax: 201-387-0291
  • Address: ATLANTIC EQUIPMENT ENGINEERS
    13 Foster Street, Bergenfield
    NJ 07621 ,United States
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7440-25-7 TANTALUM

  • United States PIDC [Manufacturer]
  • Tel: 734-930-9292
  • Fax: 734-930-9293
  • Address: PIDC
    4788 Runway Blvd.
    Ann Arbor, MI 48108 ,United States
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7440-25-7 Tantalum

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7440-25-7 TANTALUM

  • United States Cabot Corporation [Manufacturer]
  • Tel: 617-345-0100
  • Address: Two Seaport Lane
    Boston, MA 02210 ,United States
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References of tantalum
Title: Tantalum
CAS Registry Number: 7440-25-7
Literature References: Ta; at. wt 180.94788; at. no. 73; valence 5, also 4, 3, 2. Group VB (5). Two naturally occurring isotopes: 181 (99.9877%); 180 (0.0123%), T? >1012 years; artificial radioactive isotopes: 172-179; 182-186. Occurs almost invariably with niobium; less abundant than niobium. Found in the minerals columbite [(Fe,Mn)(Nb,Ta)2O6], tantalite [(Fe,Mn)(Ta, Nb)2O6] and microlite [(Na,Ca)2Ta2O6(O,OH,F)]. Discovered by Ekeberg in 1802; first obtained pure by Bolton: Z. Elektrochem. 11, 45 (1905). Prepn: Schoeller, Powell, J. Chem. Soc. 119, 1927 (1921). Reviews of tantalum and its compounds: G. L. Miller, Tantalum and Niobium (Academic Press, New York, 1959) 767 pp; Brown, "The Chemistry of Niobium and Tantalum" in Comprehensive Inorganic Chemistry vol. 3, J. C. Bailar, Jr. et al., Eds. (Pergamon Press, Oxford, 1973) pp 553-622.
Properties: Gray, very hard, malleable, ductile metal; can readily be drawn in fine wires. mp 2996°. bp 5429°. d 16.69. Spec heat (0°): 0.036 cal/g/°C. Electrical resistivity (18°): 12.4 mohm-cm. Insol in water. Very resistant to chemical attack; not attacked by acids other than hydrofluoric; not attacked by aq alkalies; slowly attacked by fused alkalies. Reacts with fluorine, chlorine, and oxygen only on heating. At high temps absorbs several hundred times its volume of hydrogen; combines with nitrogen, with carbon.
Melting point: mp 2996°
Boiling point: bp 5429°
Density: d 16.69
CAUTION: Potential symptoms of overexposure to metal and oxide dust are irritation of eyes and skin. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 294.
Use: In pen points; analytical weights; apparatus and instruments for chemical, surgical, and dental use instead of platinum, in tantalum capacitors (a type of electrolytic condenser, trademarked "Tantalytic").