| Identification | More | [Name]
L-Ornithine | [CAS]
70-26-8 | [Synonyms]
2,5-diaminopentanoic acid
L-ORNITHINE
ORNITHINE
(S)-2,5-Diaminovaleric acid
(2S)-2,5-Diaminopentanoic acid
5-Amino-L-norvaline | [EINECS(EC#)]
200-731-7 | [Molecular Formula]
C5H12N2O2 | [MDL Number]
MFCD00242584 | [Molecular Weight]
132.16 | [MOL File]
70-26-8.mol |
| Chemical Properties | Back Directory | [Melting point ]
140°C | [alpha ]
D25 +11.5° (c = 6.5) | [Boiling point ]
244.08°C (rough estimate) | [density ]
1.1740 (rough estimate) | [refractive index ]
1.4496 (estimate) | [storage temp. ]
under inert gas (nitrogen or Argon) at 2–8 °C | [solubility ]
Water: 50 mg/mL (378.33 mM); DMSO: < 1 mg/mL (insoluble or slightly soluble) | [pka]
1.705(at 25℃) | [LogP]
-4.220 | [CAS DataBase Reference]
70-26-8(CAS DataBase Reference) | [EPA Substance Registry System]
70-26-8(EPA Substance) |
| Hazard Information | Back Directory | [Definition]
ChEBI: An optically active form of ornithine having L-configuration. | [Synthesis Reference(s)]
Canadian Journal of Chemistry, 31, p. 1060, 1953 DOI: 10.1139/v53-139 | [Safety Profile]
Mutation data reported. When heated to decomposition it emits toxic vapors of NOx. | [storage]
Store at -20°C, protect from light | [Purification Methods]
Crystallise L-ornithine from water containing 1mM EDTA (to remove metal ions). [Perrin J Chem Soc 3125 1958, Rivard Biochemical Preparations 3 97 1955, Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 pp 2477-2491 1961, Beilstein 4 III 1346, 4 IV 2644.] |
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