Appearance Yellow powder
Assay,HPLC
Quercetin Dihydrate(On dry basis) 95.0%min
Loss on drying(3h at 120℃) 12.0% max
Ash(3h at 600℃) 0.3% max
Melting point 305℃-315℃
Bulk density 0.20gm/cc min
Tapped density ≥0.30gm/cc
Reducing sugars Not be detected
Heay metals 10ppm max
Lead 3ppm max
Cadmium 1ppm max
Arsenic 1ppm max
Mercury 0.1ppm max
Residue solvents Meets USP<467>
Total bacterial count 1000cfu/g max
Yeast&Mould 300cfu/g max
Escherichia coli presence Negative
Salmonella Negative
Coliforms 10cfu/g max
