Nω-Propyl-L-arginine

Also known as: N-omega-Propyl-L-arginine, (2S)-2-amino-5-[(N'-propylcarbamimidoyl)amino]pentanoic acid, 2(S)-2-amino-5-(N-propylguanidino)pentanoic acid, L-Ornithine, N5-[imino(propylamino)methyl]-, N5-[imino(propylamino)methyl]-L-ornithine, NG-Propyl-L-arginine, NW-Propyl-L-arginine, N-PLA, Tocris-1200, 3AR, N-(N'-Propylcarbamimidoyl)-L-ornithine, Nω-Propyl-L-arginine (free base)

Nω-Propyl-L-arginine (CAS 137361-05-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H20N4O2 and a molecular weight of 216.281 g/mol. Key properties include a melting point of 122 °C(lit.), a boiling point of 411.0±55.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 202.4±31.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 137361-05-8
Jingsj CID: J-28059-4
Molecular Formula: C₉H₂₀N₄O₂
Molecular Weight: 216.281 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	122 °C(lit.)
Boiling Point	411.0±55.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	202.4±31.5 °C
Exact Mass	216.158630
PSA	111.23000
LogP	0.11
Vapor Pressure	0.0±2.1 mmHg at 25°C
Refractive Index	1.550

Activity & Biological Data

Additional Information	[1]. Zhang HQ, et al. Potent and selective inhibition of neuronal nitric oxide synthase by N omega-propyl-L-arginine. J Med Chem. 1997 Nov 21;40(24):3869-70. [2]. Klamer D, et al. The neuronal selective nitric oxide synthase inhibitor, Nomega-propyl-L-arginine, blocks the effects of phencyclidine on prepulse inhibition and locomotor activity in mice. Eur J Pharmacol. 2004 Oct 25;503(1-3):103-7.

Customs & Trade Information

HS Code	2925290090
Summary	2925290090 other imines and their derivatives; salts thereof。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Nω-Propyl-L-arginine?

The CAS number of Nω-Propyl-L-arginine is 137361-05-8.

What are the molecular formula and molecular weight of Nω-Propyl-L-arginine?

Nω-Propyl-L-arginine has molecular formula C9H20N4O2 and molecular weight 216.281 g/mol.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Nω-Propyl-L-arginine (CAS 137361-05-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-28059-4 (accessed 2026-11-07).

Data for reference only; verify product details with suppliers before purchase.