Overview
Diosmin is a naturally occurring flavonoid glycoside, primarily extracted from citrus fruits or synthesized from hesperidin. It is a key active ingredient in venotonic drugs, known for improving venous tone and microcirculation. Its therapeutic effects are attributed to its ability to reduce capillary permeability and inflammation. First isolated in 1925, diosmin has since become a staple in vascular medicine. It is often combined with hesperidin for enhanced bioavailability. The compound is regulated as a pharmaceutical ingredient in many countries, with standardized formulations for clinical use.
Physical and Chemical Properties
Diosmin appears as a yellow to light brown crystalline powder with a melting point of 277–278°C. It is poorly soluble in water but dissolves in organic solvents like ethanol and DMSO. Its molecular structure includes a flavone backbone linked to a sugar moiety, contributing to its stability and biological activity. The compound exhibits strong UV absorption, making it detectable via HPLC for quality control. Its antioxidant properties arise from the scavenging of free radicals, while its venotonic effects are linked to prostaglandin inhibition and reduced leukocyte activation.
Main Applications
Diosmin is predominantly used in pharmaceuticals to treat chronic venous insufficiency (CVI) and hemorrhoids. It alleviates symptoms like leg swelling, pain, and venous ulcers by strengthening blood vessel walls. Clinical studies support its efficacy in reducing edema and improving lymphatic drainage. Beyond vascular health, diosmin is explored for its potential in diabetic retinopathy and anti-cancer therapies due to its anti-angiogenic properties. It is also included in dietary supplements for capillary fragility, though pharmaceutical-grade use remains dominant.
Safety and Storage
Diosmin is classified as low-toxicity, with rare side effects such as mild diarrhea or dizziness. It is contraindicated for individuals with allergies to citrus flavonoids. Proper storage in airtight containers at room temperature (15–25°C) ensures stability. For industrial handling, avoid inhalation of powder and use PPE to prevent irritation. Regulatory guidelines (e.g., FDA, EMA) mandate GMP compliance for pharmaceutical-grade diosmin, including purity testing and documentation of sourcing.
B2B Procurement Guide
When procuring diosmin, prioritize suppliers with ISO or GMP certifications to guarantee quality. Key specifications include purity (≥90%), residual solvent levels, and heavy metal content. Bulk pricing varies by quantity, with discounts for orders exceeding 50 kg. Request certificates of analysis (CoA) and stability studies for validation. Consider logistics: diosmin is non-hazardous but should be transported in moisture-proof packaging. Leading manufacturers are located in Europe, China, and India, with varying lead times and MOQs.
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