L(+)-Arginine

CAS	74-79-3
Structure
Synonyms	L-2-Amino-5-guanidinopentanoic acid
IUPAC Name	(2S)-2-Amino-5-(diaminomethylideneamino)pentanoic acid
Molecular Weight	174.2
Molecular Formula	C6H14N4O2
Canonical SMILES	C(CC(C(=O)O)N)CN=C(N)N
InChI	InChI=1S/C6H14N4O2/c7-4(5(11)12)2-1-3-10-6(8)9/h4H,1-3,7H2,(H,11,12)(H4,8,9,10)/t4-/m0/s1
InChI Key	ODKSFYDXXFIFQN-BYPYZUCNSA-N
Boiling Point	305.18 °C
Melting Point	222 °C(lit.)
Purity	98%
Density	1.2297 g/cm³
pKa	pK1: 1.82, pK2: 8.99, pK3: 12.5 (25°C)
pH	10.5-12.0 (0.5M H₂O, 25°C)
Solubility in Water	148.7 g/L (20 ºC)
Appearance	Solid