L-Arginine｜化工社

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HCID 6322作成日：2026年10月27日

L-Arginine

https://huagongshe.com/ja/chemical/6322

L-Arginine の分子構造式

識別子と物理属性

CAS No.	4455-52-1
分子式	C6H14N4O2
平均分子量	174.2 g/mol
単同位体質量	174.1116757 g/mol
SMILES	NC(N)=NCCC[C@H](N)C(=O)O
InChIKey	ODKSFYDXXFIFQN-BYPYZUCNSA-N
PubChem CID	6322
ChEMBL	CHEMBL1485
ChEBI	CHEBI:16467
EC No.	200-811-1

化学・物理的性質

XLogP	-4.2
極性表面積	128
水素結合供与体数	4
水素結合受容体数	4
回転可能結合数	5
重原子数	12
形式電荷	0
複雑度	176
pH	Strongly alkaline
LogP（分配係数）	-4.2log Kow = -4.20
Color/Form	Prisms containing 2 mol H2O from wateranhydrous monoclinic plates from 66% alcohol
溶解度	182000Insoluble in ethyl etherslightly soluble in ethanolIn water, 1.82X10+5 mg/l @ 25 °C182 mg/mL at 25 °CSoluble in waterInsoluble in etherSlightly soluble (in ethanol)
融点	244244 °C222 °C
Optical Rotation	Specific optical rotation: +26.9 deg @ 20 °C/C (c= 1.65 in 6.0 N hydrochloric acid)
Physical Description	Solid[Merck Index] White powder[Sigma-Aldrich MSDS]White crystals or crystalline powderodourless
Ionization Efficiency	Positive3.032.7Agilent XCTElectrospray ionizationformic acid (5.3nM)
Dissociation Constants	2.24 (at 0 °C)pK1= 2.18pK2= 9.09pK3= 13.2pKa = 2.24
Collision Cross Section	136.6 Å² [M+H]+ [CCS Type: DTMethod: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]148.6 Å² [M+Na]+ [CCS Type: DT136.4 Å² [M-H]- [CCS Type: DT137.63 Å² [M+Na]+ [CCS Type: TWMethod: calibrated with polyalanine and drug standards]141.2 Å² [M+K]+ [CCS Type: TW135.01 Å² [M+H]+ [CCS Type: TW147.8 Å² [M+Na]+ [CCS Type: DTMethod: stepped-field]132.24 Å² [M-H]- [CCS Type: DT136.4 Å² [M+H]+ [CCS Type: DTMethod: single field calibrated with Agilent tune mix (Agilent)]138.03 Å² [M-H]- [CCS Type: DT136.84 Å² [M+H]+ [CCS Type: DT133 Å² [M+H]+ [CCS Type: TWMethod: calibrated with polyalanine]
Other Experimental Properties	Contains 2 mol wateranhydrous from 66% alcoholaq soln absorb carbon dioxide from air. The saturated aq soln contains 15% (w/w) at 21 °C.Becomes anhydrous @ 105 °Cbrowns @ 230 °Cdecomp @ 244 °C /Dihydrate/

安全性と法規制

GHS 分類	This chemical does not meet GHS hazard criteria for 86.1% (1565 of 1818) of all reports.WarningH319 (13.3%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]P264+P265, P280, P305+P351+P338, and P337+P317 (click each P-code to see the statement)Aggregated GHS information provided per 1818 reports by companies from 13 notifications to the ECHA C&L Inventory.Reported as not meeting GHS hazard criteria per 1565 of 1818 reports by companies.There are 11 notifications provided by 253 of 1818 reports by companies with hazard statement code(s).Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.
規制情報	Chemical: L-ArginineRegulation (EC) No 1831/2003 (amended)Status: Active Update: 28-02-2023 https://echa.europa.eu/registration-dossier/-/registered-dossier/13725Arginine: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.L-Arginine: Does not have an individual approval but may be used under an appropriate group standard
その他の安全情報	IMAP assessments - L-Arginine: Environment tier I assessmentEvaluation - Chemicals that are unlikely to require further regulation to manage risks to human health
有害性の概要	Safe when used as a flavoring agent in food[JECFA] May cause irritation[Sigma-Aldrich MSDS]
FDA 要件	L-Arginine is a food additive permitted for direct addition to food for human consumption, as long as 1) the quantity of the substance added to food does not exceed the amount reasonably required to accomplish its intended physical, nutritive, or other technical effect in food, and 2) any substance intended for use in or on food is of appropriate food grade and is prepared and handled as a food ingredient.
Hazard Classes and Categories	Eye Irrit. 2 (13.3%)

処分方法	SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

毒性の概要

Safe in the present practices of use and concentration. Ingredient, concentration, and use information are available in documents discoverable at https://cir-reports.cir-safety.orgMany of supplemental L-arginine's activities, including its possible anti-atherogenic actions, may be accounted for by its role as the precursor to nitric oxide or NO. NO is produced by all tissues of the body and plays very important roles in the cardiovascular system, immune system and nervous system. NO is formed from L-arginine via the enzyme nitric oxide synthase or synthetase (NOS), and the effects of NO are mainly mediated by 3,'5' -cyclic guanylate or cyclic GMP. NO activates the enzyme guanylate cyclase, which catalyzes the synthesis of cyclic GMP from guanosine triphosphate or GTP. Cyclic GMP is converted to guanylic acid via the enzyme cyclic GMP phosphodiesterase. NOS is a heme-containing enzyme with some sequences similar to cytochrome P-450 reductase. Several isoforms of NOS exist, two of which are constitutive and one of which is inducible by immunological stimuli. The constitutive NOS found in the vascular endothelium is designated eNOS and that present in the brain, spinal cord and peripheral nervous system is designated nNOS. The form of NOS induced by immunological or inflammatory stimuli is known as iNOS. iNOS may be expressed constitutively in select tissues such as lung epithelium. All the nitric oxide synthases use NADPH (reduced nicotinamide adenine dinucleotide phosphate) and oxygen (O2) as cosubstrates, as well as the cofactors FAD (flavin adenine dinucleotide), FMN (flavin mononucleotide), tetrahydrobiopterin and heme. Interestingly, ascorbic acid appears to enhance NOS activity by increasing intracellular tetrahydrobiopterin. eNOS and nNOS synthesize NO in response to an increased concentration of calcium ions or in some cases in response to calcium-independent stimuli, such as shear stress. In vitro studies of NOS indicate that the Km of the enzyme for L-arginine is in the micromolar range. The concentration of L-arginine in endothelial cells, as well as in other cells, and in plasma is in the millimolar range. What this means is that, u

Antidote and Emergency Treatment

/SRP:/ Basic treatment: Establish a patent airway. Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if needed. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . Anticipate seizures and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with normal saline during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 ml/kg up to 200 ml of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool ... . Cover skin burns with dry sterile dressings after decontamination ... . /Poison A and B//SRP:/ Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in respiratory arrest. Positive pressure ventilation techniques with a bag valve mask device may be beneficial. Monitor cardiac rhythm and treat arrhythmias as necessary ... . Start an IV with D5W /SRP: "To keep open", minimal flow rate/. Use lactated Ringer's if signs of hypovolemia are present. Watch for signs of fluid overload. Consider drug therapy for pulmonary edema ... . For hypotension with signs of hypovolemia, administer fluid cautiously. Watch for signs of fluid overload ... . Treat seizures with diazepam (Valium) ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Poison A and B/