Ornithine

l-Ornithine
Names
	IUPAC name L-Ornithine
	Other names (+)-(S)-2,5-Diaminovaleric acid ; (+)-(S)-2,5-Diaminopentanoic acid
Identifiers
CAS Number	70-26-8 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:15729 ;
ChEMBL	ChEMBL446143 ;
ChemSpider	6026 ;
DrugBank	DB00129 ;
ECHA InfoCard	100.000.665
EC Number	200-731-7;
IUPHAR/BPS	725;
KEGG	D08302 ;
MeSH	Ornithine
PubChem CID	389;
UNII	E524N2IXA3 ;
CompTox Dashboard (EPA)	DTXSID00883219 ;
	InChI InChI=1S/C5H12N2O2/c6-3-1-2-4(7)5(8)9/h4H,1-3,6-7H2,(H,8,9)/t4-/m0/s1 Key: AHLPHDHHMVZTML-BYPYZUCNSA-N ; InChI=1/C5H12N2O2/c6-3-1-2-4(7)5(8)9/h4H,1-3,6-7H2,(H,8,9)/t4-/m0/s1; InChI=1/C5H12N2O2/c6-3-1-2-4(7)5(8)9/h4H,1-3,6-7H2,(H,8,9)/t4-/m0/s1 Key: AHLPHDHHMVZTML-BYPYZUCNBZ;
	SMILES O=C(O)[C@@H](N)CCCN;
Properties
Chemical formula	C5H12N2O2
Molar mass	132.16 g/mol
Melting point	140 °C (284 °F; 413 K)
Solubility in water	soluble
Solubility	soluble in ethanol
Acidity (pKa)	1.94
Chiral rotation ([α]D)	+11.5 (H2O, c = 6.5)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Ornithine is a non-proteinogenic α-amino acid that plays a role in the urea cycle. Ornithine is abnormally accumulated in the body in ornithine transcarbamylase deficiency. The radical is ornithyl.

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