NSF GMP Certified | 2-Day U.S. Delivery | Free Sample Available
Pure quercetin (95% HPLC-verified) from Sophora Japonica Extract (Quercetin) Japanese Pagoda Tree flower buds. Our California factory produces supplements, cosmetics, and functional foods with full traceability and batch-to-batch consistency.
In Stock| MOQ: 25kg | 24-Month Shelf Life

Botanical Source:Sophora japonicaL. (Japanese Pagoda Tree)
Active Compound:Quercetin aglycone
Purity Standard:≥95% (HPLC)
CAS:117-39-5
Controlled hydrolysis of dried flower buds' rutin yields this extract. The quercetin aglycone is purer than mixed-source flavonoids and contains less kaempferol.
✓Thermal Stability– Melting point 316°C supports compression, encapsulation, and heat processing
✓Clean Profile– Low impurity levels meet pharmaceutical-grade requirements
✓Consistent Supply– 4 U.S. warehouses with in-stock inventory
✓Certified Quality– NSF GMP, FSSC22000, Kosher, Halal, ISO, Organic
Immune & Respiratory Health
Commonly formulated with Sophora Japonica Extract (Quercetin), Vitamin C, zinc, and bromelain for synergistic support. Suitable for:
· Veggie capsules (50-500mg per serving)
· Softgels with MCT oil for enhanced absorption
· Tablets with phytosome complexing
Bioavailability Tip:Pair with piperine or phospholipid carriers to improve oral absorption.
Anti-Aging & UV Defense
Antioxidant properties support:
· Collagen protection serums
· Environmental stress repair creams
· Sensitive skin calming formulas
Formulation Note:Incorporate in oil phase with antioxidant stabilizers to prevent discoloration.
Natural Preservation
Replace synthetic antioxidants (BHT/BHA) in:
· Fortified beverages (heat-stable through UHT processing)
· Lipid-rich snacks (retards peroxidation)
· Cardiovascular wellness drinks

| Parameter | Specification |
|---|---|
| Latin Name | Sophora japonica L. |
| Active Compound | 95% Quercetin (HPLC) |
| Appearance | Greenish Yellow Fine Powder |
| Particle Size | 20-60 Mesh |
| Used Part | Flower Bud |
| Molecular Formula | C15H10O7 |
| CAS Number | 117-39-5 |
| Solubility | Lipophilic, Ethanol Soluble |
| Package | 25kg/Drum |
| MOQ | 25kg |
| Sample | Free Sample Available |
| Lead Time | In Stock, 2-Day Pickup |
· California Facility:15+ years botanical extraction experience
· Advanced Equipment:Supercritical CO₂ and ethanol extraction lines
· Batch Testing:Third-party verified COAs with every shipment
· Traceability:Farm-to-bottle documentation system
· U.S. Warehouse Network:4 locations (CA, TX, NJ, IL)
· Fast Turnaround:2-day pickup for in-stock items
· Flexible MOQ:25kg minimum, scalable to multi-ton orders
· R&D Support:Formulation consulting and stability testing
NSF GMP | FSSC22000 | Kosher | Halal | ISO 9001 | USDA Organic


Q: How is Sophora japonica quercetin different from onion or other sources?
A: The reduced kaempferol concentration (<3%) of our source makes purification to 95%+ simpler and more cost-effective than mixed botanical sources.
Q: What's your custom specs lead time?
A: Standard 95% purity ships in 2 days. Custom specifications (98% purity, specified mesh size) take 3-4 weeks. Contact us for feasibility.
Q: Can I obtain samples?
A: Yes. Grab 50-100g samples for free. Include shipping address and application in email.
Q: What documents come with orders?
A: Each shipment includes:
· Certificate of Analysis (COA)
· Allergen statement
· BSE/TSE declaration
· Certification copies (upon request)
Q: How should I handle formulation challenges?
A: Our R&D team offers:
· Solubility enhancement strategies
· Stability testing protocols
· Dosage recommendations based on application
Email technical questions to our team.
Do you have more questions about Sophora Japonica Extract (Quercetin)?
Email: info@em-herb.com