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CAS No 556-50-3 , 2-[(2-aminoacetyl)amino]acetic acid

  • Name: 2-[(2-aminoacetyl)amino]acetic acid
  • Synonyms: Glycyl-glycine; Glycine; N-GLYCYLGLYCINE;2-[(2-aminoacetyl)amino]acetic acid; glycyl-; Glycine dipeptide; 556-50-3;Diglycine; Gly-Gly; N-glycyl-;
  • CAS Registry Number:
  • Melting Point: 262-264 ºC
  • Density: 1.337 g/cm3
  • Safety Statements: 24/25-26
  • Hazard Symbols: Xi: Irritant;
  • HS Code: 29241900
  • EINECS: 209-127-8
  • Molecular Weight: 132.11792
  • InchiKey: YMAWOPBAYDPSLA-UHFFFAOYSA-N
  • InChI: InChI=1S/C4H8N2O3/c5-1-3(7)6-2-4(8)9/h1-2,5H2,(H,6,7)(H,8,9)
  • Risk Statements: S24/25
  • Molecular Formula: C4H8N2O3
  • Molecular Structure:CAS No:556-50-3 2-[(2-aminoacetyl)amino]acetic acid

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References of 2-[(2-aminoacetyl)amino]acetic acid
Title: N-Glycylglycine
CAS Registry Number: 556-50-3
Molecular Formula: C4H8N2O3
Molecular Weight: 132.12
Percent Composition: C 36.36%, H 6.10%, N 21.20%, O 36.33%
Line Formula: NH2CH2CONHCH2COOH
Literature References: The simplest of all peptides. Prepn from 2,5-diketopiperazine: Schott et al., J. Org. Chem. 12, 490 (1947); Greenstein, Winitz, Chemistry of the Amino Acids vol. 2, (New York, 1961) p 803. From tritylglycylglycine: Zervas et al., J. Am. Chem. Soc. 78, 1359 (1956). From phthalylglycylglycine: Sheehan, Frank, ibid. 71, 1856 (1949). From the dicyclohexylamine salt of trifluoroacetylglycylglycine: Weygand, Reiher, Ber. 88, 26 (1955).
Properties: Crystals from dil alc. Crystal shape described as small tetrahedral leaves with a lustrous ball in center. Dec 262-264°. pK1￠ 3.12; pK2￠ 8.17. Heat of combustion: 472.4 kcal/mole. Soluble in hot water; slightly sol in ethanol. Practically insol in ether.
pKa: pK1￠ 3.12; pK2￠ 8.17
 
Derivative Type: Hydrochloride monohydrate
Molecular Formula: C4H8N2O3.HCl.H2O
Molecular Weight: 186.59
Percent Composition: C 25.75%, H 5.94%, N 15.01%, O 34.30%, Cl 19.00%
Properties: Crystals from water + ethanol.
 
Derivative Type: Ethyl ester hydrochloride
Properties: Crystals from abs ethanol, dec 182°.
 
Use: In the synthesis of more complicated peptides.