Sophora Japonica Extract (Quercetin 95%)
Ville: LV, Marupe
Physical Characteristics
Analysis Item | Specification | Result |
Appearance | Light yellow to yellow green granules | Complies |
Solubility | Practically insoluble in water | Complies |
Soluble in alkaline solution | Soluble in aqueous alkaline sol | Complies |
Loss on Drying | ≤12.0% | 7.81% |
Ash | ≤0.5% | 0.10% |
Loose Density | 0.100–0.700 g/ml | 0.5505 g/ml |
Tapped Density | 0.200–0.800 g/ml | 0.6193 g/ml |
Particle Size ≥20 mesh | ≥95% | 99.34% |
Particle Size ≥40 mesh | ≥15% | 22.33% |
Particle Size ≥60 mesh | ≥10% | 16.51% |
Chemical Characteristics
Analysis Item | Specification | Result |
Heavy Metals | ≤10 ppm | Complies |
Arsenic (As) | ≤2 ppm | 0.274 ppm |
Lead (Pb) | ≤2 ppm | 0.588 ppm |
Cadmium (Cd) | ≤1 ppm | <0.05 ppm |
Mercury (Hg) | ≤0.1 ppm | <0.05 ppm |
Solvent Residual | ≤5000 ppm | Complies |
Assay (Quercetin, dried basis) | ≥95.0% | 99.7% |
Microbiological Tests
Analysis Item | Specification | Result |
Total Plate Count | ≤1000 CFU/g | <10 CFU/g |
Yeast | ≤100 CFU/g | <10 CFU/g |
Mould | ≤100 CFU/g | <10 CFU/g |
Coliforms | ≤0.92 MPN/g | Negative |
Salmonella | Not detectable | Negative |
Packaging: 25kg/drum with two food grade poly bags inside
Storage: Seal and store in a cool and dry place, avoiding direct sunlight
Shelf Life: Three years when properly stored