Overview
Fangchinoline is a naturally occurring bisbenzylisoquinoline alkaloid primarily isolated from Stephania tetrandra (Chinese: 粉防己), a plant used in traditional Chinese medicine. First characterized in the mid-20th century, this compound has gained attention in modern pharmacology due to its calcium channel blocking properties and potential therapeutic effects on hypertension and inflammatory conditions. In industrial contexts, fangchinoline is typically supplied as a high-purity powder (98-99%) for pharmaceutical research and formulation. Its dual benzylisoquinoline structure contributes to both its biological activity and chemical stability, making it suitable for various experimental and manufacturing applications.
Physical and Chemical Properties
As a crystalline alkaloid, fangchinoline demonstrates typical properties of aromatic nitrogen-containing compounds. The molecule contains multiple methoxy groups and two benzylisoquinoline units connected by ether linkages, contributing to its moderate polarity. Its UV-Vis spectrum shows maximum absorption at 282 nm, a characteristic useful for analytical quantification. The compound exhibits chirality with multiple stereocenters, though it is commonly supplied as a racemic mixture. Thermal analysis reveals good stability below 200°C, but gradual decomposition occurs at higher temperatures. In solution, fangchinoline shows pH-dependent solubility, with optimal dissolution in slightly acidic to neutral organic solvents.
Main Applications
In pharmaceutical development, fangchinoline serves as a lead compound for cardiovascular drugs due to its non-selective calcium channel blocking activity. Research indicates potential applications in managing hypertension, arrhythmias, and pulmonary arterial hypertension. The compound also shows promise as an adjunct in cancer therapy through its anti-angiogenic effects. Traditional medicine formulations utilize crude extracts containing fangchinoline for anti-inflammatory and analgesic purposes. In biochemical research, it's employed as a reference standard for quality control of herbal products and as a tool compound for studying calcium signaling pathways. Recent studies explore its neuroprotective effects in neurodegenerative disease models.
Safety and Storage
Fangchinoline requires careful handling as preliminary studies suggest dose-dependent hepatotoxicity. Laboratory personnel should use nitrile gloves and protective eyewear when working with the powder form. Although not classified as acutely toxic, prolonged skin contact or inhalation of dust should be avoided. For long-term storage, amber glass bottles with PTFE-lined caps are recommended to prevent photodegradation and moisture absorption. Bulk quantities should be subdivided to minimize repeated exposure to air. Stability studies indicate 3-year shelf life when stored at 2-8°C with desiccant packs. Contamination with heavy metals should be monitored in botanical-sourced material.
B2B Procurement Guide
Industrial buyers should prioritize suppliers who provide comprehensive analytical documentation, including HPLC chromatograms (typically C18 column, 254 nm detection), mass spectrometry verification, and residual solvent analysis. Minimum order quantities often range from 10g to 1kg for research-grade material, with bulk discounts available above 5kg. Key evaluation criteria include botanical source authentication (preferably HPLC-fingerprinted Stephania tetrandra), absence of tetrandrine contamination (a structurally similar alkaloid), and batch-to-batch consistency. For GMP applications, request full ICH stability data and microbial limit testing reports. Consider suppliers with ISO 9001 certification and dedicated alkaloid production facilities.
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