AntioxidantQuercetin
Quercetin standardised to its marker compound — Quercetin (C15H10O7). The 3-D structure is the active you’re paying for — certified by HPLC on every batch COA.
Marker compound
Quercetin (quercetin dihydrate)
95% by HPLC is the standard grade (98% by UV); dihydrate offers better stability.
We manufacture to your target — tell us the marker spec, grade and volume and we’ll build it to order.
Request custom specSophora japonica
Quercetin extract (Sophora japonica) — Quercetin — 95% by HPLC (98% by UV-Vis). Bulk B2B supply, GMP & ISO 9001 certified, export-ready. Request a quote from Espíritu Empresarial.
Specifications — hover or tap a card for our certifications
Standardisation & active profile
Quercetin — 95% by HPLC (98% by UV-Vis).
Poorly water-soluble; dihydrate grade offers improved stability; fine powder.
Antioxidant and immune-support supplements, oral pharmaceuticals, and functional foods.
Certificate of Analysis
Get the latest batch Certificate of Analysis with full standardisation, heavy-metals and microbial data. Sent to your work email within 24 hours.
