What Is Quercetin Powder?
Quercetin powder is a high-purity flavonoid antioxidant derived from the flower buds of Sophora japonica (commonly known as the Japanese pagoda tree). As one of the most extensively studied plant pigments in the flavonoid family, quercetin is naturally present in deeply pigmented fruits and vegetables such as leafy greens, tomatoes, berries, broccoli, and onions. Its characteristic yellow to yellow-green color reflects its role as a bioactive phytochemical with potent free-radical scavenging capacity.
In the dietary supplement, pharmaceutical, and functional food industries, quercetin powder sourced from Sophora japonica extract has become a sought-after raw material. Manufacturers and formulators value it for its well-documented antioxidant activity, its contribution to combating oxidative stress, and its potential role in supporting cardiovascular function, immune resilience, and healthy inflammatory response.
The Extract Factory produces this quercetin powder under tightly controlled extraction and purification protocols, delivering a consistent, high-purity ingredient suitable for bulk procurement by brand owners, contract manufacturers, and ingredient distributors worldwide.
Product Specifications
| Parameter | Detail |
|---|---|
| Product Name | Quercetin Powder (Sophora Japonica Extract) |
| Botanical Source | Sophora japonica L. (flower buds) |
| Active Ingredient | Quercetin |
| Assay (Purity) | 95%–98% |
| Appearance | Yellow to yellow-green fine powder |
| Shelf Life | 2 years (when stored under recommended conditions) |
| Packaging Options | Foil bags, multi-layer PP bags, cardboard drums; custom packaging available |
| Payment Terms | T/T, Credit Card, Western Union, PayPal, and other negotiated methods |
| Storage Conditions | Cool, dry environment; protect from direct sunlight, excessive heat, and moisture |
Botanical Source & Raw Material Quality
The primary raw material for this quercetin powder is the dried flower bud of Sophora japonica, a deciduous tree native to China and widely cultivated across East Asia. The buds are harvested at optimal maturity when quercetin glycoside content peaks, ensuring maximum yield during downstream processing.
The Extract Factory maintains stringent raw material sourcing standards. Dedicated quality personnel oversee incoming botanical materials, verifying identity, moisture content, and preliminary assay values before any extraction begins. This traceability from field to finished powder gives procurement teams confidence in batch-to-batch consistency — a critical requirement for regulated supplement and pharmaceutical manufacturing.
Extraction & Manufacturing Process
Quercetin powder is obtained through a multi-step process that typically includes:
- Raw Material Preparation — Dried Sophora japonica buds are milled to a uniform particle size to optimize solvent contact.
- Solvent Extraction — Food-grade or pharmaceutical-grade solvents are used to dissolve quercetin glycosides from the plant matrix.
- Hydrolysis & Conversion — Glycosidic bonds are cleaved to release free quercetin aglycone, the bioactive form most commonly referenced in scientific literature.
- Purification & Concentration — Filtration, column chromatography, or crystallization techniques concentrate the active ingredient to the 95%–98% target range.
- Drying & Milling — The purified quercetin is spray-dried or vacuum-dried and milled into a fine, free-flowing powder.
- Quality Control Testing — Each lot undergoes identity confirmation (HPLC, UV), purity assay, microbial testing, heavy metal screening, and residual solvent analysis before release.
The Extract Factory operates four independent production lines — including proportional extract and content extract lines — staffed by experienced technical personnel. This infrastructure supports both small-batch custom orders and large-volume supply contracts with reliable turnaround.
Physical & Chemical Characteristics
| Property | Description |
|---|---|
| Chemical Class | Flavonol (a subclass of flavonoids) |
| Molecular Formula | C₁₅H₁₀O₇ |
| Molecular Weight | 302.24 g/mol |
| Solubility | Practically insoluble in water; soluble in ethanol, DMSO, and alkaline aqueous solutions |
| Melting Point | Approximately 316 °C (with decomposition) |
| Stability | Sensitive to light, heat, and prolonged exposure to alkaline pH; best preserved in sealed, opaque packaging |
| pH Range (1% solution in ethanol) | Slightly acidic to neutral |
Understanding these characteristics helps formulators design stable products — whether quercetin is being incorporated into capsule blends, functional beverage premixes, topical preparations, or tablet formulations.
Functional Profile & Potential Applications
Quercetin is widely recognized in the nutraceutical and pharmaceutical research community for several bioactivities. While the following points reflect commonly reported properties in published literature, they are not intended as medical claims:
- Antioxidant Support — Quercetin may help neutralize free radicals and reduce oxidative stress at the cellular level.
- Histamine Modulation — Research suggests quercetin may influence histamine release from basophils and mast cells, a mechanism of interest for seasonal wellness formulations.
- Respiratory Comfort — Traditional use and preliminary studies associate Sophora japonica extract with expectorant and bronchodilatory potential.
- Anti-Inflammatory Potential — Quercetin has been studied for its capacity to modulate inflammatory pathways, which is relevant to joint health and recovery-oriented supplements.
- Cardiovascular & Circulatory Interest — Its antioxidant and anti-inflammatory actions are of ongoing interest for heart health product development.
- Skin & Tissue Support — Some research explores quercetin's role in reducing oxidative tissue damage, making it a candidate for beauty-from-within and dermal care ingredient lines.
- Gut & Metabolic Wellness — Emerging areas of study link quercetin to digestive comfort and metabolic balance.
The Extract Factory supplies quercetin powder to manufacturers developing capsules, tablets, softgels, functional foods, beverages, cosmetics, and veterinary nutraceuticals. Its broad compatibility with various delivery formats makes it a versatile building block for product pipelines.
Industry Applications
| Sector | Typical Use Cases |
|---|---|
| Dietary Supplements | Capsules, tablets, softgels, powder blends for antioxidant and immune support formulas |
| Pharmaceutical Intermediates | Research-grade raw material for formulation development and clinical-stage products |
| Functional Foods & Beverages | Fortified drinks, snack bars, meal replacements (requires solubility optimization) |
| Cosmetics & Personal Care | Anti-aging serums, skin-brightening creams, after-sun care (limited by water solubility) |
| Animal Nutrition & Veterinary | Feed additives for companion animals and livestock oxidative health support |
| Chemical & Research Reagents | Analytical standards, laboratory reference material |
Quality Assurance & Certifications
The Extract Factory underpins its quercetin powder supply with a robust quality management system:
- ISO 9001 Certified — Demonstrates consistent, documented manufacturing processes.
- Halal & Kosher Certified — Enables access to global markets with specific dietary and religious compliance requirements.
- In-House & Third-Party Testing — Every production lot is screened for identity (TLC/HPLC), assay (≥95% quercetin), microbial limits, heavy metals (Pb, As, Cd, Hg), pesticide residues, and residual solvents.
- Traceable Documentation — Certificates of Analysis (COA), Material Safety Data Sheets (MSDS), and origin documentation are provided with each shipment.
These credentials position The Extract Factory as a dependable partner for import businesses, private-label brands, and contract manufacturers that require auditable supply chains.
OEM & Custom Services
The Extract Factory offers flexible OEM and private-label solutions for quercetin powder. Whether you need a specific assay range, custom particle size, branded packaging, or co-packing with other botanical extracts, the technical team can accommodate project-specific requirements. Bulk buyers benefit from dedicated account management, volume pricing, and consistent lot availability.
Packaging, Shipping & Lead Times
| Cargo Weight | Packaging | Shipping Method | Estimated Lead Time |
|---|---|---|---|
| 5–50 kg | Below 5 kg: foil bag; 5–25 kg: double-layer PP bag inside master carton or cardboard drum | International Express (FedEx / DHL / UPS) | 7–10 business days |
| 100–200 kg | 25 kg/drum with double-layer PP bag liner inside cardboard drum | Air Freight | 7–10 business days |
| Over 500 kg | 25 kg/drum with double-layer PP bag liner inside cardboard drum | Ocean Freight (FCL / LCL) | 20–45 business days |
All shipments are professionally packed to protect quercetin powder from moisture and light exposure during transit. Custom pallet configurations and freight forwarder coordination are available upon request.
Why Source Quercetin Powder from The Extract Factory?
- Vertical Production Control — From raw botanical sourcing to final powder packaging, every step is managed in-house.
- Scalable Supply — Four dedicated production lines support orders from sample quantities to multi-ton contracts.
- Regulatory Readiness — Halal, Kosher, and ISO 9001 certifications streamline your own compliance and import processes.
- Technical Support — Formulation guidance, solubility data, and stability recommendations are available to help you integrate quercetin powder efficiently.
- Global Reach — Flexible shipping options and experienced export logistics serve customers across North America, Europe, Southeast Asia, the Middle East, and beyond.
Get in Touch
If you are evaluating quercetin powder for your next product launch, reformulation, or bulk procurement cycle, the team at The Extract Factory is ready to discuss your specifications, request samples, and provide a competitive quotation.
Contact: [email protected]
