Quercetin Dihydrate CAS 6151-25-3 Bulk Supplier | High-Purity Flavonoid Powder

Quercetin Dihydrate (CAS 6151-25-3) is a high-purity flavonoid extracted from the buds of Sophora japonica. Supplied as a fine yellow powder, it is widely used in nutraceuticals, pharmaceuticals, cosmetics, and biochemical research. Available in bulk, Quercetin Dihydrate is valued for its antioxidant properties and versatile applications across multiple industries.

Product Description

Quercetin Dihydrate is a natural flavonol known for its polyphenolic structure and functional versatility. With ≥98% purity confirmed by HPLC, it offers consistent quality for formulation development and industrial projects. The product is carefully tested for heavy metals, polycyclic aromatic hydrocarbons (PAHs), and microbiological purity, ensuring safe integration into regulated applications.

Technical Properties

• CAS Number: 6151-25-3
• Molecular Formula: C₁₅H₁₄O₉
• Molecular Weight: 338.27 g/mol
• Source: Sophora japonica (buds)
• Appearance: Fine yellow powder
• Purity: ≥ 98% (HPLC)
• Odor & Taste: Characteristic
• Sulfated Ash: ≤ 5.0%
• Loss on Drying: ≤ 12.0%
• Benzo[a]pyrene: < 10 ppb
• Sum of PAHs: < 50 ppb
• Heavy Metals: ≤ 10 ppm (Pb ≤ 2 ppm, As ≤ 1 ppm, Hg ≤ 0.1 ppm, Cd ≤ 1 ppm)
• Microbiology: TPC ≤ 10³ CFU/g, TYMC ≤ 10² CFU/g; E. coli, Salmonella, S. aureus, P. aeruginosa absent

Applications & Industries

Quercetin Dihydrate bulk powder is used across various industries as a multifunctional flavonoid with strong scientific recognition. Its natural origin and high purity make it a preferred choice for premium formulations and research projects.

• Pharmaceuticals: Applied in formulation research and experimental development due to its well-studied flavonoid structure. Its consistency supports analytical validation and quality testing in regulated environments.
• Nutraceuticals: One of the most popular ingredients in dietary supplements, often combined with vitamins and botanical extracts. Its high purity allows manufacturers to highlight clean-label and natural sourcing benefits.
• Cosmetics: Incorporated into skincare and personal care concepts that emphasize antioxidant protection and “urban defense.” Quercetin supports positioning in advanced, science-driven cosmetic lines.
• Biochemical Research: Widely used as a reference flavonoid for analytical assays and molecular studies. Its reproducible quality makes it an essential compound in laboratory testing and method development.
• Chemical Industry: Functions as a building block for fine chemical synthesis, enabling the creation of specialized derivatives for further applications.

Key Advantages

EU-based bulk supplier with consistent availability: NST Chemicals supplies Quercetin Dihydrate directly from its EU warehouse, ensuring reliable access to bulk volumes with short lead times. This reduces dependence on distant suppliers and provides cost-efficient delivery for European manufacturers.

Comprehensive quality control with heavy metal and microbiology testing: Each batch undergoes detailed analysis for lead, arsenic, mercury, and cadmium, keeping contamination levels well below safety thresholds. Microbiological purity is also guaranteed, with pathogens like E. coli and Salmonella absent. This rigorous testing ensures safety and compliance for nutraceutical and pharmaceutical use.

Flexible packaging for lab, pilot, and industrial scale: Quercetin Dihydrate is available in tailored packaging formats, making it suitable for small-scale R&D projects as well as large-scale production. Customers benefit from seamless scale-up without the need to change suppliers.

Full technical documentation included with every order: Each shipment is supplied with a Certificate of Analysis (COA), MSDS, and analytical reports. This transparency ensures regulatory compliance, facilitates audits, and provides traceability for manufacturers in tightly regulated industries.

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