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CAS No 20405-64-5 , copper Search by region : Germany

  • Name: copper
  • Synonyms: 1308-79-8;selenium;copper; Dicopper selenide; 481629_ALDRICH; Copper selenide (Cu2Se);20405-64-5; EINECS 243-796-7; Cuprous selenide;
  • CAS Registry Number:
  • Transport: UN 3077 9/PG 3
  • Flash Point: °C
  • Boiling Point: °Cat760mmHg
  • Density: g/cm3
  • Safety Statements:
    Hazard Codes T,N
    Risk Statements 23/25-33-50/53
    Safety Statements 20/21-28-45-60-61
    RIDADR UN 3077 9/PG 3
    WGK Germany 3
    HazardClass 6.1(b)
    PackingGroup III
  • Hazard Symbols: T: Toxic;N: Dangerous for the environment;
  • Flash Point: °C
  • EINECS: 243-796-7
  • Molecular Weight: 206.052
  • InchiKey: KTLOQXXVQYUCJU-UHFFFAOYSA-N
  • InChI: InChI=1S/2Cu.Se
  • Risk Statements: 23/25-33-50/53
  • Molecular Formula: Cu2Se
  • Molecular Structure:CAS No:20405-64-5 copper

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References of copper
Title: Cuprous Selenide
CAS Registry Number: 20405-64-5
Synonyms: Berzeline; selenkupfer
Molecular Formula: Cu2Se
Molecular Weight: 206.05
Percent Composition: Cu 61.68%, Se 38.32%
Literature References: Occurs in nature as the mineral berzelianite which in addition to copper and selenium contains 4.73-8.50% silver, 0.35-0.54% iron, up to 0.38% thallium and traces of lead and magnesium. Prepd by reduction of an ammoniacal soln of a cupric salt and H2SeO3 with hydrazine: Benzing et al., J. Am. Chem. Soc. 80, 2657 (1958); Kulifay, J. Inorg. Nucl. Chem. 25, 75 (1963); alternate methods: Glemser, Sauer in Handbook of Preparative Inorganic Chemistry vol. 2, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1965) p 1019.
Properties: Blue-black to black, tetragonal or cubic crystals with a metallic luster. mp 1113°. d421 6.84. Sol in HCl with evolution of H2Se, in H2SO4 with evolution of SO2, in KCN soln; oxidized by HNO3 to CuSeO3.
Melting point: mp 1113°
Density: d421 6.84
Use: In semiconductors.