Description
Product Overview
Quercetin Extract (Sophora japonica) is a high-purity flavonoid extract standardized to 98% quercetin (quercetin dihydrate, CAS 117-39-5), derived from the flower buds of Sophora japonica (Fabaceae). Quercetin is a well-known bioflavonoid with strong antioxidant, anti-histamine and immune-modulating properties. Our bulk quercetin 98% is produced by extraction and purification under GMP, ideal for immune support, seasonal allergy relief and antioxidant formulations.
Botanical Profile
- Botanical Name: Sophora japonica
- Part Used: Flower buds
- Standardization: Quercetin 98% (HPLC)
- Source: GMP-certified extraction facility, Xi’an, China
Product Specifications & Quality Standard
| Parameter | Specification |
|---|---|
| Active Ingredient | Quercetin 98% (HPLC) |
| Appearance | Yellow fine powder |
| Part Used | Flower buds |
| Mesh Size | 80 mesh (95% pass) |
| Loss on Drying | ≤ 2.0% |
| Heavy Metals | Pb ≤ 2ppm, As ≤ 2ppm, Cd ≤ 1ppm, Hg ≤ 0.1ppm |
| Microbiology | Total plate count ≤ 1000 CFU/g, E.coli/Salmonella negative |
| Solubility | Slightly soluble in water, soluble in DMSO/ethanol |
| Storage | Cool dry place, 24 months shelf life |
Physical Characteristics
Appearance: Yellow fine powder (see specification table above). Fine free-flowing powder, 80 mesh, suitable for direct encapsulation and tableting.
Key Benefits
- Strong antioxidant and free-radical scavenging activity
- Supports healthy immune response and respiratory comfort
- Natural anti-histamine support for seasonal allergies
- Supports cardiovascular and endothelial health
- Supports exercise recovery and reduced oxidative stress
- 98% high purity with consistent HPLC assay
Main Applications
Immune support capsules, tablets and powder; allergy relief formulas; antioxidant blends; sports nutrition; functional foods.
Recommended Usage
Typical dosage: 500-1000 mg quercetin per day, often combined with vitamin C and bromelain for enhanced absorption.
Why Choose Our Bulk Quercetin Extract
- GMP-certified production with ISO 9001 quality system
- HPLC/UV verified active content, batch-to-batch consistency
- Full COA, MSDS and third-party heavy metal testing per batch
- HALAL, KOSHER and organic certifications available
- Flexible MOQ with global export experience to 50+ countries
- OEM/ODM support: capsules, tablets, powder sachets and custom blends
Packaging & Storage
- Packaging: 25kg/drum, double PE bags inside, aluminum foil vacuum bag optional
- Storage: Store in cool, dry, well-ventilated place away from direct sunlight
- Shelf Life: 24 months under proper storage
FAQ About Wholesale Quercetin Extract
Q: What is quercetin CAS?
CAS 117-39-5 (quercetin dihydrate).
Q: What is the source?
Sophora japonica flower buds (Japanese pagoda tree).
Q: Is it suitable for vegans?
Yes, 100% plant-derived, no animal ingredients.
Q: Do you provide COA?
Yes, per-batch COA with HPLC assay and full quality tests.
Q: Can it be encapsulated easily?
Yes, fine free-flowing powder, good for capsules and tablets.
Q: What is the MOQ?
25kg per drum; samples available.
Inquiry & Cooperation
As a professional botanical extract manufacturer with 20 years of export experience, we supply high-quality Quercetin Extract at competitive bulk prices. Contact our sales team for spec sheets, COA samples and quotations.
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