Quercetin Dihydrate

Quercetin Dihydrate from Sophora japonica, 95% / 98% specifications. Sourced through qualified production partners for dietary supplement and functional food manufacturers.

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Available Specifications

Per QU-001 (Verified 2026-09-20):

Specifications subject to product requirements and destination-market regulations.

Product Overview

Technical Specifications

All specifications subject to product specification and destination-market requirements.

Quality & Documentation

• Certificate of Analysis (COA) per batch with HPLC verification of Quercetin
• Heavy metals testing panel (Pb, As, Cd, Hg) via ICP-MS
• Microbiology panel per USP
• Material Safety Data Sheet (MSDS) documentation
• Non-GMO statement
• Allergen statement
• Third-party SGS testing available upon request

Applications

• Dietary Supplements: Considered for use in antioxidant and immune support formulations.
• Functional Food & Beverage: Considered for fortification in functional beverages (immune positioning).
• Cosmeceuticals: Considered for use in topical skincare formulations (antioxidant, anti-aging).
• Sports Nutrition: Considered for use in endurance and recovery formulations.

Why Source from Nourish Ingredients?

1. Specification Matching: Three Quercetin specifications (Dihydrate 95%, Dihydrate 98%, Anhydrous) for formulation flexibility.
2. Supplier Verification: Production partners maintain FSSC 22000, BRCGS, EU Organic, USDA Organic certifications.
3. Sample Comparison: 25-100g samples available for specification evaluation.
4. Third-Party Testing: SGS verification available for Quercetin, heavy metals, and microbiology.
5. Documentation Support: Comprehensive documentation package including COA, MSDS, allergen, and Non-GMO statements.

Supply & Ordering

• Sample Availability: 25-100g samples available; standard samples ship within 5-7 business days.
• Minimum Order Quantity (MOQ): 25 kg for standard specifications; smaller quantities for evaluation.
• Lead Time: 7-15 business days from order confirmation.
• Packaging: 25 kg fiber drum with double food-grade PE liner; custom packaging available.
• Shipping: Worldwide shipping via air, sea, or courier; documentation prepared for customs clearance.

Frequently Asked Questions

Q1: What's the difference between Quercetin Dihydrate and Anhydrous?

Quercetin Dihydrate contains ~9-12% water (two water molecules per quercetin). Anhydrous Quercetin contains no water (~3-4% higher Quercetin content per gram). Both are pharmacopoeia-accepted.

Q2: What is Quercetin?

Quercetin is a flavonoid found in many fruits, vegetables, and grains. It is considered one of the most abundant dietary antioxidants and is associated with anti-inflammatory and immune support positioning.

Q3: Can Quercetin be combined with other ingredients?

Quercetin is commonly combined with Vitamin C (for enhanced absorption), Bromelain, and Zinc in immune support formulations. We recommend consulting with your formulation team.

Q4: What's the regulatory status in the EU?

Quercetin is permitted as a food supplement ingredient in the EU under Novel Food Regulation 2015/2283 (per EC 2017/2470). Specific regulatory status depends on intended application and labeling.

Q5: How is Quercetin content measured?

Quercetin content is quantified via HPLC with UV detection at 370 nm per USP / Ph. Eur. methods.

Q6: What's the typical MOQ?

Standard MOQ is 25 kg. Smaller quantities (5-10 kg) are available for evaluation.

Q7: Do you offer custom specifications?

Yes. Custom specifications (e.g., specific Quercetin content, hydrate form, particle size) can be discussed with our coordination team.

Q8: What documentation is available?

Standard documentation includes COA, MSDS, allergen statement, Non-GMO statement. Additional documentation available upon request from production partners.

Related Resources

• Quercetin Dihydrate for Dietary Supplements →
• How to Verify Botanical Extract Quality: 12 Points →

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Compliance Note

Data marked as "typical" reflects industry standards; specific values vary by supplier and batch. Documentation including COA, MSDS, allergen, and Non-GMO documentation is available upon request from production partners.

About Nourish Ingredients: We are a China-based sourcing partner for botanical extracts and nutraceutical ingredients. We coordinate supply for international brands — from specification matching to delivery. Production partners maintain FSSC 22000, BRCGS, EU Organic, USDA Organic, FAMI-QS certifications. Documentation available upon request.

For ingredient sourcing inquiries: ashely@nourishingr.com

Reviewed by: Nourish Ingredients Editorial Team   Version: 2.3   Last updated: 2026-09-20