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CAS No 72-19-5 , L-Threonine

  • Name: L-Threonine
  • Synonyms: (2S,3R)-2-amino-3-hydroxy-butanoic acid;L-Threonine (9CI);Valine,3-hydroxy-;Threonine, L-;Threonine, L- (8CI);Threonine [USAN:INN];L-Threonine;(2S,3S)-2-azaniumyl-3-hydroxy-butanoate;L-thr;L-Threonine(Feed Grade);Threoninum [Latin];L-Threonine Aji97;36676-50-3;Threonine (VAN);L-(-)-Threonine;2-Amino-3-hydroxybutanoic acid, (R-(R*,S*))-;thre;2-amino-3-hydroxy-butanoic acid;Butanoic acid, 2-amino-3-hydroxy-, (R-(R*,S*))-;SORT:L-Threonine(Feed Grade);L-Threonin;48: PN: WO2004076659 FIGURE: 7 claimed sequence;L-THREONINE FOR BIOCHEMISTRY;L-alpha-Amino-beta-hydroxybutyric acid;Thr;L-Threonine (JP14);L- Threonine;(2S,3R)-2-azaniumyl-3-hydroxy-butanoate;H-Thr-OH;L-Thr-OH;THREONINE (L);Butanoic acid, 2-amino-3-hydroxy-, [R-(R*,S*)]-;Threonine (USP);1/C4H9NO3/c1-2(6)3(5)4(7)8/h2-3,6H,5H2,1H3,(H,7,8;THREONINE, (L);(2S,3R)-2-Amino-3-hydroxybutyric acid;[R-(R*,S*)]-2-Amino-3-hydroxybutanoic acid;Treonina [Spanish];(2R,3R)-2-amino-3-hydroxy-butanoic acid;L-2-Amino-3-hydroxybutyric acid;2-Amino-3-hydroxybutyric acid;(S)-Threonine;(2S,3R)-2-amino-3-hydroxybutanoic acid;Threonine;Threonin;(2S)-threonine;13095-55-1;
  • CAS Registry Number:
  • Density: 1.307 g/cm3
  • Alpha: -28.4 º (C=6, H2O)
  • Water Solubility: 90 G/L (20 ºC)
  • Safety Statements: 24/25-37/39-26
  • Hazard Symbols: Xi: Irritant;
  • EINECS: 200-774-1
  • Molecular Weight: 119.1192
  • InChI: InChI=1S/C4H9NO3/c1-2(6)3(5)4(7)8/h2-3,6H,5H2,1H3,(H,7,8)/t2-,3+/m0/s1
  • Risk Statements: 36/37/38
  • Molecular Formula: C4H9NO3
  • Molecular Structure:CAS No:72-19-5 L-Threonine

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References of L-Threonine
Title: Threonine
CAS Registry Number: 72-19-5
CAS Name: L-Threonine
Synonyms: Thr; T; (2S,3R)-2-amino-3-hydroxybutyric acid; a-amino-b-hydroxybutyric acid
Molecular Formula: C4H9NO3
Molecular Weight: 119.12
Percent Composition: C 40.33%, H 7.62%, N 11.76%, O 40.29%
Literature References: An essential amino acid for human development; last of the common amino acids to be discovered. Identified in oat protein: S. B. Schryver, H. W. Buston, Proc. Roy. Soc. London 99B, 476 (1925/6); isolated from blood fibrin: W. C. Rose, J. Biol. Chem. 109, 77 (1935). Structure: C. E. Meyer, W. C. Rose, ibid. 115, 721 (1936). Early chemistry and biochemistry: Amino Acids and Proteins, D. M. Greenberg, Ed. (Charles C. Thomas, Springfield, IL, 1951) 950 pp., passim; J. P. Greenstein, M. Winitz, Chemistry of the Amino Acids vols 1-3 (John Wiley and Sons, Inc., New York, 1961) pp. 2238-2258, passim. GC/MS metabolism study: O. Ballevre et al., Anal. Biochem. 193, 212 (1991). Clinical evaluation in amyotrophic lateral sclerosis: J. B. Roufs, Med. Hypotheses 34, 20 (1991); O. Blin et al., J. Neurol. 239, 79 (1992). Review of microbial production: Daoust, Dev. Ind. Microbiol. 7, 41 (1966); R. Bhattacharyya et al., Hind. Antibiot. Bull. 30, 54-65 (1988). Review of biosynthesis: G. N. Cohen in Amino Acids, Biotechnol. Ser. 3, 147-171 (1983); of regulation of biosynthesis: G. Galili, Plant Cell 7, 899-906 (1995).
Properties: Crystals, dec 255-257°. [a]D26 -28.3° (c = 1.09). pK1￠ 2.63; pK2￠ 10.43. Freely sol in water. Insol in common neutral solvents.
pKa: pK1￠ 2.63; pK2￠ 10.43
Optical Rotation: [a]D26 -28.3° (c = 1.09)
 
Derivative Type: DL-Form hemihydrate
Properties: Orthorhombic crystals, dec 229-230°.