Description

Quinidine is a stereoisomer of quinine and a class IA antiarrhythmic agent with established pharmacological properties. It is a critical active pharmaceutical ingredient (API) and a vital reference standard in analytical chemistry. This compound is essential for manufacturers and research institutions in the pharmaceutical, biotechnology, and analytical sectors requiring high-purity materials for drug development, quality control, and biochemical research.

Application

• Pharmaceutical Active Ingredient (API): Primary use as a class IA antiarrhythmic agent in the formulation of medications for cardiac arrhythmias.
• Pharmacological Research: Used as a standard and tool compound in cardiovascular research and studies of ion channel (potassium channel) blockade.
• Analytical Reference Standard: Serves as a high-purity certified reference material (CRM) for quality control testing, method validation, and assay calibration in pharmaceutical analysis.
• Biochemical Studies: Employed in in-vitro studies to investigate its effects on cellular electrophysiology and muscle contractility.
• Chemical Synthesis: Acts as a chiral starting material or intermediate in the synthesis of more complex alkaloids and related pharmaceutical compounds.

Basic Information

Product Name	Quinidine
CAS No.	56-54-2
Molecular Formula	C20H24N2O2
Molecular Weight	324.42 g/mol
Synonyms	(9S)-6'-Methoxycinchonan-9-ol; Cinchonan-9-ol, 6'-methoxy-, (9S)-; β-Quinidine; Pitayine; Conchinine; Quinidine alkaloid; (8α,9R)-6'-Methoxycinchonan-9-ol; Conquinine
EINECS	200-279-0

Quality Control

Our Quinidine is manufactured and tested under a strict quality management system. We offer material compliant with major pharmacopoeial standards, including USP and EP monographs. Every batch is supported by a comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles, ensuring it meets the rigorous demands of pharmaceutical applications and regulatory submissions.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and must be kept in a dry environment to maintain stability and purity.

Specification

Item	Specification
Appearance	White or almost white crystalline powder
Identification (IR)	Conforms to standard
Identification (HPLC)	Retention time corresponds to reference standard
Assay (HPLC)	98.0% - 102.0% (on dried basis)
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Specific Optical Rotation	-245° to -275° (in ethanol)
Related Substances (HPLC)	Individual impurity: ≤ 0.5%; Total impurities: ≤ 1.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.