L-Arginine

Also known as: Arginine, (S)-2-Amino-5-guanidinopentanoic acid, L-α-Amino-δ-guanidinovaleric acid, H-Arg-OH, L-Ornithine, N5-(aminoiminomethyl)-, 5-[(Aminoiminomethyl)amino]-L-norvaline, Arg, L-(+)-Arginine, L-ARG-OH, L-arginin

L-Arginine (CAS 74-79-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H14N4O2 and a molecular weight of 174.201 g/mol. Key properties include a melting point of 222 °C (dec.)(lit.), a boiling point of 367.6±52.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 176.1±30.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 74-79-3
Jingsj CID: J-30434-4
Molecular Formula: C₆H₁₄N₄O₂
Molecular Weight: 174.201 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	222 °C (dec.)(lit.)
Boiling Point	367.6±52.0 °C at 760 mmHg
Density	1.5±0.1 g/cm3
Flash Point	176.1±30.7 °C
Exact Mass	174.111679
PSA	125.22000
LogP	-1.79
Vapor Pressure	0.0±1.8 mmHg at 25°C
Refractive Index	1.601
Additional Property	148.7 g/L (20 ºC)

Activity & Biological Data

Target	Human Endogenous Metabolite
Additional Information	[1]. Tapiero H, et al. I. Arginine. Biomed Pharmacother. 2002 Nov;56(9):439-45. [2]. Bakker J, et al. Administration of the nitric oxide synthase inhibitor NG-methyl-L-arginine hydrochloride (546C88) by intravenous infusion for up to 72 hours can promote the resolution of shock in patients with severe sepsis: results of a randomized, double-blind, placebo-controlled multicenter study (study no. 144-002). Crit Care Med. 2004 Jan;32(1):1-12. [3]. Yamada M, et al. Endothelial nitric oxide synthase-dependent cerebral blood flow augmentation by L-arginine after chronic statin treatment. J Cereb Blood Flow Metab. 2000 Apr;20(4):709-17.

Target

Human Endogenous Metabolite

Additional Information

[1]. Tapiero H, et al. I. Arginine. Biomed Pharmacother. 2002 Nov;56(9):439-45. [2]. Bakker J, et al. Administration of the nitric oxide synthase inhibitor NG-methyl-L-arginine hydrochloride (546C88) by intravenous infusion for up to 72 hours can promote the resolution of shock in patients with severe sepsis: results of a randomized, double-blind, placebo-controlled multicenter study (study no. 144-002). Crit Care Med. 2004 Jan;32(1):1-12. [3]. Yamada M, et al. Endothelial nitric oxide synthase-dependent cerebral blood flow augmentation by L-arginine after chronic statin treatment. J Cereb Blood Flow Metab. 2000 Apr;20(4):709-17.

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 L-Arginine?

The CAS number of L-Arginine is 74-79-3.

What are the molecular formula and molecular weight of L-Arginine?

L-Arginine has molecular formula C6H14N4O2 and molecular weight 174.201 g/mol.

What are the upstream and downstream products of L-Arginine?

For L-Arginine, Upstream Products: DL-Arginine, Fmoc-L-arginine, Nα-Benzyloxycarbonyl-Nω-nitro-L-arginine; Downstream Products: D-(+)-Octopine, Guanidinoacetic acid, L-Ornithine.

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. "L-Arginine (CAS 74-79-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-30434-4 (accessed 2026-11-06).

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