L-Ornithine Chemical Properties

Melting point:

140°C

Boiling point:

244.08°C (rough estimate)

alpha 

D25 +11.5° (c = 6.5)

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℃)

form 

Solid

color 

White to off-white

PH

9.70

optical activity

+12.125 (H2O)　+28.425 (5 mol dm-3 HCl)

InChI

InChI=1S/C5H12N2O2/c6-3-1-2-4(7)5(8)9/h4H,1-3,6-7H2,(H,8,9)/t4-/m0/s1

InChIKey

AHLPHDHHMVZTML-BYPYZUCNSA-N

SMILES

C(O)(=O)[C@H](CCCN)N

LogP

-4.220

CAS DataBase Reference

70-26-8(CAS DataBase Reference)

EPA Substance Registry System

L-Ornithine (70-26-8)

Safety Information

Toxicity

sce-hmn-lym 10 mg/L MUREAV 372,75,1996

L-Ornithine Usage And Synthesis

Chemical Properties

Crystals from alcoholether. Soluble in water and alcohol.

Uses

Biochemical research; medicine.

Uses

hepatoprotectant, anticholesteremic

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.

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.]

L-Ornithine(70-26-8)Related Product Information

• Ethyl 2-(Chlorosulfonyl)acetate
• Lithium diisopropylamide
• 5-AMINOVALERIC ACID
• N,N-Dimethyl-1,4-phenylenediamine
• 4,4'-Methylenedianiline
• Iminodiacetic acid
• 4,4'-Diaminodiphenylsulfone
• Folic acid
• Iminodiacetonitrile
• Ascoric Acid
• L-Glutamine
• L-Arginine L-glutamate
• TOS-ARG-OH
• N-ALPHA-BENZOYL-L-ARGININE
• L(+)-Arginine
• N-ALPHA-ACETYL-L-ARGININE
• N5-[IMINO(NITROAMINO)METHYL]-L-ORNITHINE,N5-[IMINO(NITROAMINO)METHYL]-L-ORNITHINE
• Ethyl N-benzoyl-L-argininate hydrochloride