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1,5-Diphenylcarbazide

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1,5-Diphenylcarbazide Basic information
1,5-Diphenylcarbazide Chemical Properties
  • Melting point:170-175 °C(lit.)
  • Boiling point:385.1°C (rough estimate)
  • Density 1.31 g/cm3
  • refractive index 1.6120 (estimate)
  • storage temp. 2-8°C
  • solubility aqueous acetone: passes test
  • pka9.98±0.43(Predicted)
  • form Powder or Flakes
  • color White to cream
  • OdorOdorless
  • Water Solubility Soluble in glacial acetic acid, alcohol and acetone. Slightly soluble in water.
  • Sensitive Light Sensitive
  • Merck 14,3321
  • BRN 752039
  • Stability:Stable. Light sensitive. Incompatible with strong oxidizing agents.
  • CAS DataBase Reference140-22-7(CAS DataBase Reference)
  • NIST Chemistry ReferenceN'',n'''-diphenylcarbonohydrazide(140-22-7)
  • EPA Substance Registry SystemCarbonic dihydrazide, 2,2'-diphenyl- (140-22-7)
Safety Information
  • Hazard Codes Xi
  • Risk Statements 36/37/38
  • Safety Statements 26-36
  • WGK Germany 3
  • RTECS FF2750000
  • 8-10-23
  • TSCA Yes
  • HazardClass IRRITANT
  • HS Code 29280090
MSDS
1,5-Diphenylcarbazide Usage And Synthesis
  • Chemical Propertieswhite crystals or powder
  • Uses1,5-Diphenylcarbazideis a carbazide derivative used in the colorimteric determination of chromium as well as in the detection of cadmium, mercury, magnesium and aldehydes.
  • UsesAs indicator in titrating Fe; for the colorimetric determination of Cr, detection of Cd, Hg, Mg, aldehydes, emetine.
  • Purification MethodsA common impurity is phenyl-semicarbazide which can be removed by chromatography: ~8g in H2O is placed on a column (polyamide 6 powder, Macherey-Nagel-GmbH-Germany, washed several times with MeOH), eluted with H2O/MeOH/AcOH (1:3:0.04) at 7-8 drops/second, then eluted with the same solvent mixture but diluted 5 fold with H2O. The purification is followed by UV light at 280nm. The effluent is evaporated to dryness in vacuo at ~28o. [chromatography, IR & UV: Willems et al. Anal Chim Acta 51 544 1970]. Recrystallise it from EtOH by adding CCl4 to induce crystallisation, or AcOH to give a white crystalline powder which turns pink in air. It is air and light sensitive and should be stored in the dark under N2. [Beilstein 15 H 292, 15 IV 182.]
1,5-Diphenylcarbazide Preparation Products And Raw materials
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