Overview
Rutin extract is a bioflavonoid naturally found in various plants, notably buckwheat, citrus fruits, and Sophora japonica (Japanese pagoda tree). It is chemically classified as a glycoside combining the flavonol quercetin and the disaccharide rutinose. As a potent antioxidant, rutin has been extensively studied for its health benefits, particularly in supporting vascular health and reducing oxidative stress. In industrial applications, rutin is extracted through solvent-based methods, often using ethanol or water, followed by purification processes. The extract is standardized to specific flavonoid content, typically 95% or higher, to ensure consistency in pharmaceutical and nutraceutical formulations.
Physical and Chemical Properties
Rutin appears as a fine yellow to greenish-yellow crystalline powder with a bitter taste. Its molecular structure includes hydroxyl groups that contribute to its antioxidant activity. The compound decomposes upon melting rather than exhibiting a clear boiling point, which is common for many organic compounds. Solubility is a critical factor for formulation: rutin dissolves well in alkaline solutions due to the deprotonation of its hydroxyl groups but has limited solubility in neutral or acidic water. This property necessitates careful consideration in product development, often requiring solubilizing agents for liquid formulations.
Main Applications
In the pharmaceutical industry, rutin is used in medications for vascular disorders, such as chronic venous insufficiency and hemorrhoids, due to its ability to reduce capillary permeability and fragility. It is also incorporated into anti-inflammatory formulations and antioxidant supplements. The nutraceutical sector utilizes rutin in dietary supplements targeting cardiovascular health, often combined with vitamin C to enhance bioavailability. Cosmetic applications include anti-aging creams and sunscreens, where rutin’s UV-protective and collagen-stabilizing effects are valued. Additionally, rutin serves as a natural pigment and stabilizer in some functional foods.
Safety and Storage
Rutin is generally considered safe with a low toxicity profile. Regulatory agencies such as the FDA classify it as GRAS (Generally Recognized as Safe) for use in foods and supplements. However, excessive intake (above 1,000 mg/day) may cause mild side effects like nausea or headache. Proper storage is essential to maintain stability. Rutin extract should be kept in airtight containers protected from light, moisture, and high temperatures (below 25°C). Degradation under improper conditions can lead to reduced efficacy and changes in physical appearance, such as darkening of the powder.
B2B Procurement Guide
Industrial buyers should prioritize suppliers that provide certificates of analysis (CoA) detailing purity, heavy metal content, and residual solvents. Extraction methods (e.g., ethanol vs. water) can impact the final product’s suitability for specific applications, so this should align with the intended use. Bulk pricing often varies based on order volume and purity grade. For reference, pharmaceutical-grade rutin (98% purity) commands a premium over lower grades. Long-term contracts with suppliers can secure stable pricing, especially given fluctuations in raw material availability from botanical sources.
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