Overview
Quercetin is a naturally occurring flavonoid found in many plants, fruits, and vegetables, including apples, onions, and berries. It is widely recognized for its antioxidant and anti-inflammatory properties. As a bioactive compound, quercetin has been extensively studied for its potential health benefits, including cardiovascular support and immune system modulation. In industrial applications, quercetin is commonly used in dietary supplements, pharmaceuticals, and functional foods. Its ability to scavenge free radicals makes it a valuable ingredient in antioxidant formulations. The compound is typically extracted from plant sources or synthesized for commercial use.
Physical and Chemical Properties
Quercetin is a yellow crystalline powder with a molecular weight of 302.24 g/mol. It has a melting point of 316-317°C and is slightly soluble in water but more soluble in organic solvents like ethanol and acetone. The compound exhibits strong UV absorption, making it useful in sunscreens and other UV-protective products. Chemically, quercetin belongs to the flavonol subclass of flavonoids, characterized by a 3-hydroxyflavone backbone. Its structure includes multiple hydroxyl groups, which contribute to its antioxidant activity. The compound is stable under normal storage conditions but may degrade when exposed to prolonged heat or light.
Main Applications
Quercetin is widely used in the dietary supplement industry due to its purported health benefits, including anti-inflammatory and immune-boosting effects. It is often included in formulations targeting cardiovascular health, allergy relief, and oxidative stress reduction. In the food industry, quercetin serves as a natural preservative and antioxidant, extending the shelf life of products. It is also used in cosmetics for its skin-protective properties, particularly in anti-aging and sun care products. Pharmaceutical applications include its use in formulations designed to support metabolic health and reduce inflammation.
Safety and Storage
Quercetin is generally considered safe for consumption, with few reported side effects at typical dosages. However, high doses may cause gastrointestinal discomfort or headaches. It is important to follow recommended guidelines when using quercetin in supplements or pharmaceuticals. Storage conditions are critical to maintaining the compound's stability. Quercetin should be kept in a cool, dry place, away from direct sunlight and moisture. Proper packaging, such as airtight containers, helps prevent degradation. Industrial users should also ensure compliance with safety regulations during handling and storage.
B2B Procurement Guide
When procuring quercetin, buyers should prioritize suppliers with verified certifications, such as ISO or GMP. Key specifications to check include purity (≥95%), solubility, and absence of heavy metals or contaminants. Batch testing reports and certificates of analysis are essential for quality assurance. Price ranges vary depending on purity and supplier, with typical costs between $20-$50 per kg. Bulk purchases may offer cost savings, but buyers should balance price with quality considerations. Reliable suppliers often provide technical support and customized formulations to meet specific application needs.
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