Quercetin Suppliers & Exporter for the Spain Market

Ethylene Oxide sterilization is completely prohibited across the European Union under Regulation (EC) No 396/2005. To guarantee absolute compliance for Spanish health authorities (AESAN), our botanical raw material drying and purification cycles utilize steam and closed vacuum chambers with zero chemical fumigation. Furthermore, every export production lot is cross-tested via GC-MS/MS for the sum of Ethylene Oxide and 2-Chloroethanol, validating non-detectable concentrations below the strict 0.01 mg/kg limit. Third-party verification reports from Eurofins or SGS are available upon request with commercial documentation.

Quercetin Dihydrate contains two crystal-bound water molecules within its lattice, naturally resulting in a loss on drying (moisture) measurement between 9.5% and 12.5%. It represents the standard, cost-effective bioflavonoid referenced in the European Pharmacopoeia and is extensively used in hard two-piece capsules and general powder formulations. Quercetin Anhydrous undergoes controlled thermal vacuum dehydration to strip the bound water molecules, yielding a moisture profile under 1.5% to 3.0%. Anhydrous grades are specifically selected by Spanish labs formulating moisture-sensitive effervescent tablets, direct-compression solid doses, or blends containing hygroscopic botanicals and probiotics.

Yes. In Spain, dietary supplements are regulated by Real Decreto 1487/2009 (and its update RD 130/2018), which operates alongside the EU principle of Mutual Recognition (Regulation (EU) 2019/515). Quercetin derived from Sophora japonica has an established history of safe commercial consumption within the EU prior to May 1997, confirming it does not fall under novel food restrictions (Regulation EU 2015/2283) at standard dietary intake levels (typically up to 500 mg/day). We provide complete raw material documentation and toxicological safety profiles enabling seamless AESAN administrative notifications.

UV spectrophotometry measures total light absorbance at specific wavelengths (typically around 370 nm). However, UV is non-specific; it measures all structurally related flavonoid backbones, glycosides, and degradation derivatives indiscriminately, frequently generating inflated assay readings above 99% or 100%. Conversely, High-Performance Liquid Chromatography (HPLC-DAD) chromatographically isolates and measures the distinct retention time of pure Quercetin aglycone against calibrated USP or Ph. Eur. reference standards. UniCare releases all pharmaceutical batches based strictly on HPLC assay verification to guarantee absolute chemical precision.

For commercial validation and pre-production pilot batches, our minimum order quantity starts at 25 kg (standard fiber drum with double inner pharmaceutical-grade polyethylene liners). Standard production lead time is 5 to 7 working days from order confirmation. Air freight delivery into Madrid-Barajas (MAD) or Barcelona El Prat (BCN) averages 4 to 6 transit days. Full container load (FCL) or less-than-container (LCL) ocean freight shipments to Puerto de Valencia or Port de Barcelona typically arrive within 24 to 30 calendar days.

Yes. Unprocessed quercetin crystals can cause filling weight variances on automated encapsulation equipment. We provide specialized jet-milled micronized powder reaching a particle size of 100% passing 80 mesh, D50 < 5 μm, and D90 < 20 μm. For contract packagers utilizing high-speed direct compression tableting machines, we also manufacture a free-flowing, dustless dry granulated grade featuring high bulk density (0.50–0.65 g/mL) that prevents die segregation and tablet capping.

Every shipment is accompanied by a batch-specific Certificate of Analysis (COA) documenting physicochemical limits, HPLC purity, heavy metal content, residual solvents, and full microbiological testing (Total Plate Count, Yeast & Mold, Salmonella, E. coli, Staphylococcus aureus). Upon supplier qualification initiation, we provide our ISO 9001, ISO 22000, HACCP, GMP compliance documentation, Kosher, Halal certificates, alongside a technical statement dossier (Allergen-free, Non-GMO, BSE/TSE-free, Non-Irradiation, Vegan statement, and European REACH clearance).

Quercetin exhibits excellent thermal stability when protected from direct ultraviolet radiation and high relative humidity. Under ICH Climate Zone II guidelines (subtropical Mediterranean climates typical of eastern and southern Spain), raw containers should be stored in their original sealed hermetic packaging in cool, dry facilities maintained below 25°C with relative humidity under 60%. When maintained according to specification, our Quercetin retains verified chemical stability for 24 to 36 months from manufacturing.