Overview
Strophanthin is a naturally occurring cardiac glycoside extracted from the seeds of Strophanthus plants, notably Strophanthus gratus and Strophanthus kombé. It was historically used as a treatment for heart conditions due to its ability to enhance cardiac output by inhibiting the Na+/K+-ATPase pump. Though largely replaced by digoxin and other modern pharmaceuticals, strophanthin remains of interest in specific medical and research contexts. Its two primary forms, ouabain (G-strophanthin) and k-strophanthin, differ slightly in structure and potency. Ouabain, the more commonly referenced form, is derived from Strophanthus gratus and has been studied for its role in endogenous cardiac regulation.
Physical and Chemical Properties
Strophanthin is a crystalline compound with a bitter taste, soluble in polar solvents like water and ethanol. Its molecular structure includes a steroid nucleus linked to a sugar moiety, characteristic of cardiac glycosides. The compound decomposes at high temperatures rather than boiling, limiting its stability under heat. Its mechanism of action involves binding to the Na+/K+-ATPase pump in cardiac myocytes, leading to increased intracellular calcium concentrations and enhanced myocardial contractility. This property underpins its historical use in heart failure, though its narrow therapeutic window necessitates careful dosing.
Main Applications
In the early 20th century, strophanthin was a frontline treatment for congestive heart failure and atrial arrhythmias. Its rapid onset of action made it particularly useful in acute settings. However, the development of safer alternatives like digoxin and beta-blockers has relegated it to niche applications, including veterinary medicine and laboratory research. Recent studies have explored ouabain's potential as an endogenous hormone regulating blood pressure and cardiac function. Despite this, clinical use remains rare due to toxicity risks, with most procurement today driven by research or specialized therapeutic needs.
Safety and Storage
Strophanthin's toxicity demands stringent handling protocols. Accidental ingestion or inhalation can cause severe cardiac arrhythmias, nausea, and even death. Laboratories and pharmacies storing the compound must ensure airtight containers, temperature control, and clear hazard labeling. For long-term stability, it should be kept in amber glass vials at temperatures below 25°C, with desiccants to prevent moisture absorption. Disposal must comply with hazardous waste regulations, as environmental release could pose risks to aquatic life.
B2B Procurement Guide
Procuring strophanthin requires due diligence to ensure quality and regulatory compliance. Buyers should prioritize suppliers with pharmaceutical-grade certifications (e.g., USP or EP standards) and verify batch-specific COAs (Certificates of Analysis). Due to its controlled status in many countries, import/export permits may be necessary. Pricing varies significantly by purity (typically 95%-99%) and quantity, with bulk purchases often negotiated directly with manufacturers. Spot purchases of small quantities for research may cost $100-$500 per gram. Always confirm storage and shipping conditions to prevent degradation.
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