- Product Name: Quercetin Powder 98% - Botanical Source: Sophora Japonica L. (Pagoda Tree Flower Buds) - Active Ingredient: Quercetin (Anhydrous / Dihydrate) - Purity Specification: 98% (Tested by HPLC) - Appearance: Fine and even light yellow-green powder - Particle Size: 100% pass 80 mesh - Odor & Taste: Slight characteristic plant odor, no peculiar smell - Moisture: ≤5.0% - Heavy Metal: Complies with EU and FDA food safety standards