Quercetin

Quercetin (CAS 117-39-5), also known as quercetol, is a naturally derived flavonoid sourced primarily from plant materials such as onion skins, capers, and sophora japonica.

Where is Quercetin used?

• Food: natural yellow pigment and antioxidant stabilizer in beverages, confectionery coatings, and functional food products
• Dietary supplements: formulated into capsules and tablets for antioxidant and immune-support positioning
• Cosmetics and skincare: creams and serums for UV-stabilizing and oxidative protection, common in anti-aging lines
• Pharmaceutical manufacturers use it as an active botanical ingredient in standardized herbal extracts and nutraceutical formulations.

Commercial specifications

• Purity levels typically range from 95% to 98%+ depending on application requirements
• Dihydrate forms are also available commercially for specific formulation needs
• Bulk supply is available for industrial-scale formulation, with sophora japonica-derived material being the most common source