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CAS No 4156-16-5 , 3-(2-ethyl-1,2-oxazol-2-ium-5-yl)benzenesulfonate Search by region : China

  • Name: 3-(2-ethyl-1,2-oxazol-2-ium-5-yl)benzenesulfonate
  • Synonyms: NEPIS;Woodward's Reagent K; N-ETHYL-5-PHENYLISOXAZOLIUM-3'-SULFONATE; 4156-16-5;3-(2-ethyl-1,2-oxazol-2-ium-5-yl)benzenesulfonate; 2-Ethyl-5-phenylisoxazolium-3'-sulfonate;
  • CAS Registry Number:
  • Melting Point: 220 ºC (DEC.)
  • Flash Point: °C
  • Boiling Point: °Cat760mmHg
  • Density: g/cm3
  • Water Solubility: soluble
  • Safety Statements: S24/25
  • Flash Point: °C
  • EINECS: 223-988-7
  • Molecular Weight: 253.27434
  • InchiKey: MWOOKDULMBMMPN-UHFFFAOYSA-N
  • InChI: InChI=1S/C11H11NO4S/c1-2-12-7-6-11(16-12)9-4-3-5-10(8-9)17(13,
    14)15/h3-8H,2H2,1H3
  • Risk Statements: S24/25:Avoidcontactwithskinandeyes.;
  • Molecular Formula: C11H11NO4S
  • Molecular Structure:CAS No:4156-16-5 3-(2-ethyl-1,2-oxazol-2-ium-5-yl)benzenesulfonate

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References of 3-(2-ethyl-1,2-oxazol-2-ium-5-yl)benzenesulfonate
Title: Woodward's Reagent K
CAS Registry Number: 4156-16-5
CAS Name: 2-Ethyl-5-(3-sulfophenyl)isoxazolium inner salt
Synonyms: N-ethyl-5-phenylisoxazolium-3￠-sulfonate
Molecular Formula: C11H11NO4S
Molecular Weight: 253.27
Percent Composition: C 52.16%, H 4.38%, N 5.53%, O 25.27%, S 12.66%
Literature References: Prepd by reacting 5-phenylisoxazole with chlorosulfonic acid, followed by alkylation with triethyloxonium fluoroborate, and acid hydrolysis: Woodward et al., J. Am. Chem. Soc. 83, 1010 (1961).
Properties: Crystals, dec 207-208°. Stable. Non-hygroscopic.
Use: Peptide-bond former.