China Quercetin Suppliers & Exporter serving the Singapore market

Quercetin Dihydrate contains two bound water molecules within its crystalline lattice, yielding a Karl Fischer moisture level typically between 9.5% and 12.5%. It is the standard reference material referenced in the United States Pharmacopeia (USP) and European Pharmacopoeia (EP). Quercetin Anhydrous is subjected to controlled thermal dehydration, reducing moisture content below 4.0%. For solid dosage manufacturing in Singapore's tropical humidity, Quercetin Anhydrous is favored in hygroscopic multi-ingredient formulations (such as blends with Vitamin C, Zinc, or effervescent tablets) to avoid moisture transfer and capsule brittleness.

The Singapore Health Sciences Authority (HSA) specifies strict regulatory ceilings for finished health supplements: Lead (≤ 10 mg/kg), Arsenic (≤ 5 mg/kg), Cadmium (≤ 0.3 mg/kg), and Mercury (≤ 0.5 mg/kg). UniCare enforces release limits on raw bulk quercetin that are significantly tighter than statutory ceilings: Lead < 1.0 ppm, Arsenic < 0.5 ppm, Cadmium < 0.1 ppm, and Mercury < 0.1 ppm, measured by Inductively Coupled Plasma Mass Spectrometry (ICP-MS). This provides formulators with an extensive safety margin when compounding complex multi-ingredient finished products.

Every shipment arrives with a lot-specific Certificate of Analysis (COA) containing assay by HPLC, complete residual solvent profile (GC), heavy metal determination (ICP-MS), 450+ pesticide multi-residue screen, microbial enumeration, and physical specifications. Supplementary documentation supplied for quality verification includes: Technical Data Sheets (TDS), Safety Data Sheets (SDS/MSDS), Manufacturing Flow Charts, Non-GMO Statements, BSE/TSE declarations, Allergen statements, and Certificate of Origin (Form E for preferential ASEAN-China tariff treatment).

Yes. Our standard milled grade is 80 mesh, which offers excellent flowability for standard hopper feeding. For direct compression tablets, high-speed automated encapsulation, or suspension liquids, we produce customized micronized grades milled via closed-loop nitrogen air-jet systems to 200 mesh (D90 < 25 microns) or 300 mesh (D90 < 10 microns). Laser diffraction particle size distribution reports (Malvern Mastersizer) are provided upon request.

For urgent pilot runs or R&D lots (25 kg to 200 kg), we dispatch air cargo via Singapore Airlines Cargo or direct carriers landing at Changi International Airport (SIN), achieving door-to-door transit within 3 to 5 business days. Full container loads (FCL) or commercial LCL orders ship from Shanghai or Shenzhen ports directly to Jurong Port with an ocean transit time of just 6 to 9 days, ensuring minimal supply chain lead times and low inventory carry costs.