Quinidine

Also known as: (+)-Quinidine, (8R,9S)-6'-Methoxycinchonan-9-ol, (9S)-6'-Methoxycinchonan-9-ol, 6-Methoxy-α-(5-vinyl-2-quinuclidinyl)-4-quinolinemethanol, B-Quinine, Beta-Quinidine, Chinidin, Cinchonan-9-ol, 6'-methoxy-, (9S)-, Cin-quin, Conchinine, Conquinine, Pitayine, Quinidex, Quindine

Quinidine (CAS 56-54-2) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C20H24N2O2 and a molecular weight of 324.417 g/mol. Key properties include a melting point of 168-172 °C(lit.), a boiling point of 495.9±40.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 253.7±27.3 °C. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 56-54-2
Jingsj CID: J-31042-9
Molecular Formula: C₂₀H₂₄N₂O₂
Molecular Weight: 324.417 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	168-172 °C(lit.)
Boiling Point	495.9±40.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	253.7±27.3 °C
Exact Mass	324.183777
PSA	45.59000
LogP	3.44
Vapor Pressure	0.0±1.3 mmHg at 25°C
Refractive Index	1.638
Additional Property	0.05 g/100 mL (20 ºC)

GHS Safety & Compliance

Acute ToxicitySignal word: Danger

H301 — Toxic if swallowed

Activity & Biological Data

Target	Parasite[1]
Additional Information	[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.

Target

Parasite[1]

Additional Information

[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.

Customs & Trade Information

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%

Frequently Asked Questions

What is the CAS number of Quinidine?

The CAS number of Quinidine is 56-54-2.

What are the molecular formula and molecular weight of Quinidine?

Quinidine has molecular formula C20H24N2O2 and molecular weight 324.417 g/mol.

Is Quinidine hazardous?

Quinidine has GHS signal word Danger and hazard statements H301 — Toxic if swallowed.

What are the upstream and downstream products of Quinidine?

For Quinidine, Upstream Products: 6-Methoxyquinoline-4-carbaldehyde, (6-methoxyquinolin-4-yl)methanol; Downstream Products: (8α,9R)-Cinchonan-6',9-diol, 6-Methoxy-4-quinolinecarboxylic acid, Viquidil.

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. "Quinidine (CAS 56-54-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-31042-9 (accessed 2026-11-09).

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