Quercetin Powder
Botanical Source: Sophora japonica
Specification: 98%
Appearance: Yellow Fine powder
Used Part: Flower Bud
Test Method: UV
Molecular Formula: C15H10O7
Molecular Weight: 302.236
CAS No.: 117-39-5
MOQ: 1 kg
Sample: 20 g
Packing: 1 kg in aluminum foil bag; 25 kg in fibre drum
Delivery: FedEx, DHL, air shipment, sea shipment
Certifications: ISO, HACCP, KOSHER, HALAL, BRC
Features:
Non-irradiated
GMO-free, allergen-free, TSE/BSE-free
Not treated with ETO during production, storage, or transportation
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Reliable Quercetin Powder Manufacturer & Bulk Supplier
Greenherb operates a dedicated flavonoid extraction line for Quercetin Powder. We source Sophora japonicaflower buds from contracted orchards, applying short-steam enzyme inactivation and sub-50°C ethanol extraction to protect native quercetin from enzymatic and thermal degradation. Recrystallization steps push assay to 95%/98% (HPLC, USP-aligned). Full export documentation and third-party testing ship with every batch.
Why Choose Greenherb Quercetin Powder
● Bud-Exclusive Sourcing – Unlike onion- or apple-derived material with <0.1% native quercetin, Sophorabuds deliver stable high-baseline actives, making our pure quercetin powder (98%) viable without excessive solvent cycling.
● Recrystallization Over Crude Extract – Many suppliers stop at resin-purified quercetin extract (mixed flavonoids: quercetin + rutin + kaempferol). We run an extra recrystallization pass to isolate single-marker quercetin, cutting residual rutin to <1%.
● Enzyme-Inactivation Pretreatment – Steam-blanching buds within 4h of harvest stops endogenous enzymes that break down quercetin, a step most bulk vendors skip.
● USP-NF Alignment – 98% grade tested against USP monograph (HPLC, impurity profile), suited for brands positioning best quercetin powder claims with verifiable compliance.
● Light-Sensitive Handling – 98% crystalline grade vacuum-packed in amber barrier bags, nitrogen-flushed drums to prevent oxidative yellowing during storage.
● Heavy Metal & Pesticide Screening – Multi-point ICP-MS and GC-MS per EU/US food-grade thresholds.
● Mesh & Carrier Flexibility – Default 80 mesh; carrier-adjusted grades (maltodextrin/silica) available for capsule flow or drink-mix dispersibility.
● Direct Bulk Pricing – Transparent quotes for quercetin powder bulk from 25kg trial to full FCL, no distributor layer.
Certificate of Analysis
Product Introduction
Quercetin Powder is a single-marker flavonol ingredient isolated from Sophora japonicaflower buds. It differs from broad-spectrum Sophoratotal flavonoid extract (which carries quercetin + rutin + kaempferol in unstandardized ratios): this product locks quercetin as the sole primary marker via recrystallization, delivering batch-consistent assay for formulators who need a defined flavonol load rather than a mixed botanical matrix. Two commercial grades run: 95% for blended immune SKUs and 98% for premium single-ingredient capsules.
Production Process
Greenherb follows a quercetin-specific workflow:
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Bud Harvest & Enzymatic Kill – Sophorabuds picked at full plumpness, steam-blanched <4h post-harvest to deactivate quercetinase.
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Low-Temp Drying – Belt drying <45°C, then uniform grinding.
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Ethanol Extraction – Sub-50°C ethanol pulls quercetin and companion flavonoids.
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Resin Purification – Macroporous resin strips rutin and pigments, concentrating quercetin fraction.
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Recrystallization – Solvent-based crystal purge pushes assay to 98%, residue rutin <1%.
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Vacuum Drying – Low-heat drying preserves crystalline structure.
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QC Release – HPLC (USP method) for quercetin assay, impurity check, heavy metals, pesticides, microbiology per batch.
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Protective Packaging – 98% grade vacuum-sealed in amber PE + desiccant, nitrogen-flushed fiber drums; 95% grade in standard light-shielded drums.
Functional Properties & Benefits
● Single-Marker Consistency – No lot-to-lot drift from mixed flavonoid loads; assay locked on quercetin via HPLC.
● Antioxidant Anchor – Frequently paired with vitamin C, rutin, or bromelain in synergistic immune/inflammatory-support blends.
● Formulation Versatility – 95% grade for cost-sensitive blends, 98% crystalline for premium SKUs requiring label claim precision.
● Stability Engineered – Low moisture + nitrogen + amber packaging supports 24-month shelf for 98% grade.
Applications
Immune & Seasonal Wellness
Capsule/tablet fill for quercetin-only or quercetin+vitamin C/rutin blended SKUs.
Sports Recovery
98% grade for post-exercise oxidative-stress formulations, often combined with bromelain or omega-3 carriers.
Functional Food & Beverage
Carrier-adjusted 95% grade for drink mixes, gummies, and fortified snack lines needing dispersible flavonol content.
Private Label R&D
Lab samples for brands testing quercetin stability in high-heat processing (extrusion, retort) — our low-moisture 98% grade shows better thermal retention than crude extracts.
Contact Greenherb for Quercetin Powder Supply
Greenherb supplies Quercetin Powder in 95% and 98% grades, with full USP-aligned COA and regulatory dossiers. We accommodate quercetin powder bulk orders from 25kg trial batches to full container loads, and can adjust carrier systems for dispersibility or compressibility on request.
For technical data or sample requests, contact our sourcing team directly.
Greenherb – Your Strategic Partner for Specialty Botanical Extracts.
GreenHerb is a trusted supplier of high‑quality plant extract powders. We offer custom specifications, strict third‑party quality control, and reliable global shipping. Whether you need samples or bulk orders, we deliver pure, consistent ingredients to customers worldwide.
Global Shipping Coverage
We offer worldwide shipping service for all plant extract powder items. Orders can be delivered to most countries and regions, meeting diverse international business demands.
Safe & Efficient Distribution
- We provide all customs documents (invoice, COA, packing list) and a tracking number for every order. Shipping cost is calculated at checkout. For bulk orders, contact us for a competitive freight quote.
- We offer flexible packaging: 1kg, 5kg, 10kg, 25kg bags, or bulk drums. Customizable bag materials (foil, kraft paper)
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CONTACT INFORMATION
Do you have questions about how we can help your company? Send us an email and we’ll get in touch shortly.
