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S-Methyl-L-cysteine

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S-Methyl-L-cysteine Basic information
S-Methyl-L-cysteine Chemical Properties
  • Melting point:~240 °C (dec.)
  • alpha -29.5 º (c=1,water)
  • Boiling point:300.3±37.0 °C(Predicted)
  • Density 1.149 (estimate)
  • refractive index -30 ° (C=2, H2O)
  • storage temp. Keep in dark place,Sealed in dry,Store in freezer, under -20°C
  • pkapK1:8.97 (25°C)
  • BRN 1721675
  • CAS DataBase Reference1187-84-4(CAS DataBase Reference)
  • NIST Chemistry References-Methyl-L-cysteine(1187-84-4)
Safety Information
MSDS
S-Methyl-L-cysteine Usage And Synthesis
  • Chemical Propertieswhite to light beige fine crystalline powder
  • DefinitionChEBI: A cysteine derivative that is L-cysteine in which the hydrogen attached to the sulfur is replaced by a methyl group.
  • Purification MethodsLikely impurities are cysteine and S-methyl-dl-cysteine. Crystallise it from H2O by adding 4volumes of EtOH. It also crystallises from MeOH with m 234-236o(dec), but after sublimation i t has m 267-270o and [] 27D -31.6o (c 1, H2O). [Rinderknecht et al. Helv Chim Acta 41 1, 10 1958, Theodoropoulos Acta Chem Scand 13 383 1959, Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 p 1904 1961, Beilstein 4 IV 3145.]
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