Quinidine

Modify Date: 2026-06-30 12:31:08

Quinidine structure	Common Name	Quinidine
	CAS Number	56-54-2	Molecular Weight	324.417
	Density	1.2±0.1 g/cm3	Boiling Point	495.9±40.0 °C at 760 mmHg
	Molecular Formula	C₂₀H₂₄N₂O₂	Melting Point	168-172 °C(lit.)
	MSDS	Chinese USA	Flash Point	253.7±27.3 °C
	Symbol	GHS06	Signal Word	Danger

Use of Quinidine

Quinidine is an antiarrhythmic agent for the treatment of abnormal heart rhythms and also malaria.

This table lists Chinese names, IUPAC names and various aliases of this chemical substance.

Name	quinidine
Synonym	More Synonyms

This table contains bioactivity, target information and biological‑assay experimental data of this compound.

Description	Quinidine is an antiarrhythmic agent for the treatment of abnormal heart rhythms and also malaria.
Related Catalog	Signaling Pathways >> Anti-infection >> Parasite Research Areas >> Cardiovascular Disease Research Areas >> Infection
Target	Parasite[1]
In Vitro	Quinidine is a clinical anti-arrythmic drug which affects ionic currents in heart muscle and which has also been shown to be a potent blocker of several classes of K+ channel in a variety of cell types. Bath application of quinidine causes a dose-dependent reduction of the peak amplitude of Ik. The Kd for blockade of Ik at 0 mV is estimated to be 41 μM. Quinidine elicits a dose-dependent increase of the rate of the decay of Ik and this effect is enhanced by membrane depolarization. Quinidine also causes a 5 mV hyperpolarizing shift of the steady-state inactivation curve and increases the half-time for recovery from inactivation. Quinidine does not affect the onset of inactivation measured at -30 mV[1].
In Vivo	Quinidine sulfate is rapidly absorbed, with peak plasma concentrations 60-90 min after an oral dose. Other salts (gluconate, polygalacturonate) are more slowly absorbed, with lower peak concentrations. Quinidine is approximately 70-90 % bound to plasma proteins. It undergoes hepatic oxidative metabolism to form an N-oxide, a 3-hydroxy form, an O-demethyl form and 2'-quinidinone. Over one-half of patients starting quinidine stop within the first year of therapy because of side effects. These include, commonly, diarrhea, nausea, and vomiting which are not necessarily related to high plasma concentrations[2]. Quinidine inhibits metabolism of amphetamine in rats. Quinidine pretreatment results in a significant decrease in the excretion of p-hydroxyamphetamine at 24 and 48 h to 7.2 and 24.1% of the vehicle-control levels, respectively, accompanied by a significant increase in amphetamine excretion between 24 and 48 h to 542% of the control[3].
Animal Admin	Rats: Three rats are placed in individual metabolic cages with free access to food and water. After 24 h, urine is collected (0 h) and the rats receive the following treatment: (1) no treatment; (2) 80 mg quinidine/kg (po) at 1.0 mL/kg, and (III) 50% ethanol (1.0 mL/kg). Two hours later, all three rats receive a single dose of 15 mg amphetamine/kg (po) at 1.0 mL/kg. Urine is then collected at 24 and 48 h after the administration of quinidine. This procedure is repeated three times. After collection of urine, volume and pH are measured and the urine is stored until analysis[3].
References	[1]. Kehl SJ, et al. Quinidine-induced inhibition of the fast transient outward K+ current in rat melanotrophs. Br J Pharmacol. 1991 Jul;103(3):1807-13. [2]. Roden DM, et al. Class I antiarrhythmic agents: quinidine, procainamide and N-acetylprocainamide, disopyramide. [3]. Moody DE, et al. Quinidine inhibits in vivo metabolism of amphetamine in rats: impact upon correlation between GC/MS and immunoassay findings in rat urine. J Anal Toxicol. 1990 Sep-Oct;14(5):311-7.

This table shows physicochemical parameters including melting point, boiling point, density, solubility and optical rotation. Missing data is marked as N/A.

Density	1.2±0.1 g/cm3
Boiling Point	495.9±40.0 °C at 760 mmHg
Melting Point	168-172 °C(lit.)
Molecular Formula	C₂₀H₂₄N₂O₂
Molecular Weight	324.417
Flash Point	253.7±27.3 °C
Exact Mass	324.183777
PSA	45.59000
LogP	3.44
Vapour Pressure	0.0±1.3 mmHg at 25°C
Index of Refraction	1.638
InChIKey	LOUPRKONTZGTKE-LHHVKLHASA-N
SMILES	C=CC1CN2CCC1CC2C(O)c1ccnc2ccc(OC)cc12
Water Solubility	0.05 g/100 mL (20 ºC)

This table provides MSDS information including hazard classification, first‑aid, fire‑fighting, spill handling, operation and storage instructions.

Quinidine MSDS(Chinese)

This table summarizes toxicological test data, acute & chronic toxicity and ecological hazard parameters for this chemical.

CHEMICAL IDENTIFICATION

RTECS NUMBER :: VA4725000

CHEMICAL NAME :: Quinidine

CAS REGISTRY NUMBER :: 56-54-2

LAST UPDATED :: 199707

DATA ITEMS CITED :: 16

MOLECULAR FORMULA :: C20-H24-N2-O2

MOLECULAR WEIGHT :: 324.46

WISWESSER LINE NOTATION :: T66 BNJ HO1 EYQ- DT66 A B CNTJ A1U1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: Standard Draize test

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rabbit

REFERENCE :: AIPTAK Archives Internationales de Pharmacodynamie et de Therapie. (Heymans Institute of Pharmacology, De Pintelaan 185, B-9000 Ghent, Belgium) V.4- 1898- Volume(issue)/page/year: 137,410,1962 ** ACUTE TOXICITY DATA **

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 263 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: ARZNAD Arzneimittel-Forschung. Drug Research. (Editio Cantor Verlag, Postfach 1255, W-7960 Aulendorf, Fed. Rep. Ger.) V.1- 1951- Volume(issue)/page/year: 27,589,1977

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 23 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10- Volume(issue)/page/year: 128,22,1960

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Unreported

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 60 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: FATOAO Farmakologiya i Toksikologiya (Moscow). For English translation, see PHTXA6 and RPTOAN. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.2- 1939- Volume(issue)/page/year: 54(3),32,1991

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 535 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10- Volume(issue)/page/year: 105,291,1952

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 135 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: AIPTAK Archives Internationales de Pharmacodynamie et de Therapie. (Heymans Institute of Pharmacology, De Pintelaan 185, B-9000 Ghent, Belgium) V.4- 1898- Volume(issue)/page/year: 137,410,1962

TYPE OF TEST :: LDLo - Lowest published lethal dose

ROUTE OF EXPOSURE :: Subcutaneous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 400 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: AEPPAE Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. (Berlin, Ger.) V.110-253, 1925-66. For publisher information, see NSAPCC. Volume(issue)/page/year: 205,129,1948

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 53600 ug/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: JMCMAR Journal of Medicinal Chemistry. (American Chemical Soc., Distribution Office Dept. 223, POB POB 57136, West End Stn., Washington, DC 20037) V.6- 1963- Volume(issue)/page/year: 27,1142,1984

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intramuscular

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 200 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: 27ZIAQ "Drug Dosages in Laboratory Animals - A Handbook," Rev. ed., Barnes, C.D., and L.G. Eltherington, Berkeley, Univ. of California Press, 1973 Volume(issue)/page/year: -,232,1973

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Mammal - cat

DOSE/DURATION :: 30 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: AIPTAK Archives Internationales de Pharmacodynamie et de Therapie. (Heymans Institute of Pharmacology, De Pintelaan 185, B-9000 Ghent, Belgium) V.4- 1898- Volume(issue)/page/year: 226,286,1977

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Unreported

SPECIES OBSERVED :: Mammal - species unspecified

DOSE/DURATION :: 67 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: FATOAO Farmakologiya i Toksikologiya (Moscow). For English translation, see PHTXA6 and RPTOAN. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.2- 1939- Volume(issue)/page/year: 48(5),43,1985 ** OTHER MULTIPLE DOSE TOXICITY DATA **

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 650 mg/kg/7W-I

TOXIC EFFECTS :: Cardiac - EKG changes not diagnostic of specified effects

REFERENCE :: ARTODN Archives of Toxicology. (Springer-Verlag, Heidelberger Pl. 3, D-1000 Berlin 33, Fed. Rep. Ger.) V.32- 1974- Volume(issue)/page/year: 51,43,1982 *** REVIEWS *** TOXICOLOGY REVIEW FNSCA6 Forensic Science. (Lausanne, Switzerland) V.1-11, 1972-78. For pub lisher information, see FSINDR. Volume(issue)/page/year: 2,67,1973 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - A1119 No. of Facilities: 43 (estimated) No. of Industries: 1 No. of Occupations: 2 No. of Employees: 85 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - A1119 No. of Facilities: 44 (estimated) No. of Industries: 1 No. of Occupations: 3 No. of Employees: 1723 (estimated) No. of Female Employees: 975 (estimated)

This table covers safety warnings, protective measures, incompatible substances and disposal guidelines for this compound.

Symbol	GHS06
Signal Word	Danger
Hazard Statements	H301
Precautionary Statements	P301 + P310
Personal Protective Equipment	dust mask type N95 (US);Eyeshields;Faceshields;Gloves
Hazard Codes	Xn:Harmful;
Risk Phrases	R22
Safety Phrases	S36-S22
RIDADR	UN 2811 6.1/PG 3
WGK Germany	3
RTECS	VA4725000
Packaging Group	III
Hazard Class	6.1(b)
HS Code	2933990090

This table presents publicly reported synthetic routes, reaction conditions, reactants and product information of the compound.

This table lists upstream starting materials and downstream derivative products related to this chemical.

Precursor 10
CAS#:56652-53-0 (9S)-9-acetate-... CAS#:657408-10-1 (4S)-[3-(6-meth... CAS#:4363-94-4 6-Methoxy-4-qui... CAS#:865853-19-6 2-(trimethylsil...
CAS#:865853-23-2 2-(trimethylsil... CAS#:865853-22-1 2-(trimethylsil... CAS#:865853-21-0 2-(trimethylsil... CAS#:865853-20-9 2-(trimethylsil...
CAS#:92288-15-8 (6-methoxyquino... CAS#:35189-37-8 (+)-N-benzoylme...
DownStream 10
CAS#:60723-43-5 9-Acetoxyrubanone CAS#:524-63-0 (8α,9R)-Cinchon... CAS#:86-68-0 Quininic acid CAS#:84-31-1 (8alpha)-6'-met...
CAS#:14528-53-1 quinidinone CAS#:84-55-9 viquidil CAS#:56-54-2 Quinidine CAS#:77481-82-4 n-benzylquinidi...
CAS#:599-04-2 D-(-)-Pantolactone CAS#:135754-90-4

This table shows customs‑related data including HS‑code, tariff and regulatory conditions for import and export.

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

This table lists relevant public references with title, journal and publication metadata for this compound.

Organic anion transporting polypeptides and organic cation transporter 1 contribute to the cellular uptake of the flavonoid quercetin.

Naunyn Schmiedebergs Arch. Pharmacol. 387(9) , 883-91, (2014)

Flavonoids such as quercetin and kaempferol mediate several health protective effects, e.g., anticancer effects. They are inhibitors of organic anion transporting polypeptides (OATP) and organic catio...

Morphological behaviour and metabolic capacity of cryopreserved human primary hepatocytes cultivated in a perfused multiwell device.

Xenobiotica 45(1) , 29-44, (2014)

1. The quantitative prediction of the pharmacokinetic parameters of a drug from data obtained using human in vitro systems remains a significant challenge i.e. prediction of metabolic clearance in hum...

Utility of cerebrospinal fluid drug concentration as a surrogate for unbound brain concentration in nonhuman primates.

Drug Metab. Pharmacokinet. 29(5) , 419-26, (2014)

In central nervous system drug discovery, cerebrospinal fluid (CSF) drug concentration (C(CSF)) has been widely used as a surrogate for unbound brain concentrations (C(u,brain)). However, previous rod...

This table contains target information, in‑vitro & in‑vivo assay data for this compound.

Name: Hemodynamic effect in intravenously dosed Sprague-Dawley rat with ischemia-induced ar...
Source: ChEMBL
Target: Rattus norvegicus
External Id: CHEMBL904108

Name: Antiarrhythmic activity in intravenously dosed Sprague-Dawley rat with ischemia-induc...
Source: ChEMBL
Target: Rattus norvegicus
External Id: CHEMBL904109

Name: Primary qHTS assay for inhibitors of alpha-synuclein gene (SNCA) expression
Source: NCGC
External Id: SNCA-p-activity-luciferase

Name: Minimal effective dose that resulted in significant reduction in PVC frequency in con...
Source: ChEMBL
Target: Canis lupus familiaris
External Id: CHEMBL666831

Name: Effect on blood pressure in intravenously dosed Sprague-Dawley rat assessed as dose p...
Source: ChEMBL
Target: Rattus norvegicus
External Id: CHEMBL905103

Name: Antiarrhythmic activity in rabbit heart assessed as reduction in aconitine-induced ve...
Source: ChEMBL
Target: Heart
External Id: CHEMBL3257592

Name: Antiarrhythmic activity in iv dosed mongrel dog assessed as reduction in ouabain-indu...
Source: ChEMBL
Target: Canis lupus familiaris
External Id: CHEMBL3257594

Name: Cytochrome P450 Family 1 Subfamily A Member 2 (CYP1A2) small molecule antagonists: lu...
Source: 824
External Id: CYP273

Name: Antiarrhythmic activity in iv dosed mongrel dog assessed as reduction in ouabain-indu...
Source: ChEMBL
Target: Canis lupus familiaris
External Id: CHEMBL3257593

Name: CNS toxicity in iv dosed Sprague-Dawley rat assessed as cumulative convulsion dose
Source: ChEMBL
Target: Rattus norvegicus
External Id: CHEMBL904107

Total 1184, Current Page 1 of 119

This table collects all English aliases, systematic names and CAS‑related synonyms of the compound.

Conchinin

Chinidin

(S)-(6-Methoxy-4-quinolinyl)[(2R,4S,5R)-5-vinyl-1-azabicyclo[2.2.2]oct-2-yl]methanol

Cin-quin

(8R,9S)-6'-Methoxycinchonan-9-ol

Coccinine

(9S)-6'-Methoxycinchonan-9-ol

Quinidex

(S)-[(2R,4S,5R)-5-ethenyl-1-azabicyclo[2.2.2]oct-2-yl](6-methoxyquinolin-4-yl)methanol

Quinidine,(S)-(6-Methoxyquinolin-4-yl)((2R,4S,8R)-8-vinylquinuclidin-2-yl)methanolhydrochloride

Quinidine [BAN]

Raclopride

QUINDINE

(9S)-6-Methoxy-a-(5-vinyl-2-quinuclidinyl)-4-quinolinemethanol

TCMDC-131239

(S)-(6-Methoxy-4-chinolinyl)[(2R,4S,5R)-5-vinyl-1-azabicyclo[2.2.2]oct-2-yl]methanol

Kinidin

MFCD00135581

(S)-[(2R,4S,5R)-5-éthènyl-1-azabicyclo[2.2.2]oct-2-yl](6-méthoxy-4-quinoléinyl)méthanol

QUNIDINE

PITAYINE

Quinidine

(3a,9S)-6'-methoxycinchonan-9-ol

Pitayin

EINECS 200-279-0

(9S)-6-Methoxy-α-(5-vinyl-2-quinuclidinyl)-4-quinolinemethanol

This section contains frequently‑asked‑questions about this compound, including basic parameters, properties, storage conditions and corresponding answers.

Q: What is the polar surface area (PSA) of quinidine?

A: Polar surface area (PSA) of quinidine is 45.59000.

Q: What is the SMILES notation of quinidine?

A: SMILES notation of quinidine is C=CC1CN2CCC1CC2C(O)c1ccnc2ccc(OC)cc12.

Q: What is the InChIKey of quinidine?

A: InChIKey of quinidine is LOUPRKONTZGTKE-LHHVKLHASA-N.

Q: What are the upstream materials of quinidine?

A: Related upstream materials(CAS) of quinidine: 56652-53-0;657408-10-1;4363-94-4;865853-19-6;865853-23-2;865853-22-1;865853-21-0;865853-20-9;92288-15-8;35189-37-8.

Q: What are the downstream products of quinidine?

A: Related downstream products(CAS) of quinidine: 60723-43-5;524-63-0;86-68-0;84-31-1;14528-53-1;84-55-9;56-54-2;77481-82-4;599-04-2;135754-90-4.

Q: What is the molecular formula of quinidine?

A: Molecular formula of quinidine is C20H24N2O2.

Q: What is the melting point of quinidine?

A: Melting point of quinidine is 168-172 °C(lit.).

Q: What is the boiling point of quinidine?

A: Boiling point of quinidine is 495.9±40.0 °C at 760 mmHg.

Q: What is the molecular weight of quinidine?

A: Molecular weight of quinidine is 324.417.

Q: What is the English name of quinidine?

A: The English name of quinidine is quinidine.

This table lists manufacturers and suppliers of this compound, including vendor names and product supply reference information.

Shanghai Nianxing Industrial Co., Ltd

BioBioPha

Henan Tianfu Chemical Co., Ltd.

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Shanghai Nianxing Industrial Co., Ltd
China
Product Name: Quinidine
Price: Check
Purity: 98.0%
Delivery: 10 Day
Contact: Yang
Email: sales@echemcloud.com

BioBioPha
China
Product Name: Quinidine
Price: ￥Inquiry/5mg
Purity: 98.0%
Delivery: 10 Day
Contact: Xueping-Zheng
Email: 1477035482@qq.com

Henan Tianfu Chemical Co., Ltd.
China
Product Name: Quinidine
Price: $Inquiry/1kg $Inquiry/25kg $Inquiry/1000kg $Inquiry/10ton
Purity: 99.0%
Delivery: Inquiry
Contact: Anson
Email: info@tianfuchem.com

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Price: ￥117/5g

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