| Color | Yellow or greenish-yellow |
| Form | Crystalline powder |
| Active Ingredients | Impurity quercetin |
| Assay (dry basis) | < 5.0% |
| Assay Method | UV |
| Particle Size | 100% pass 80 mesh |
| Loss on Drying | 5.5-9.0% |
| Ignition Residue | ≤ 0.5% |
| Heavy Metals | < 20 ppm |
| Total Plate Count | < 1000 cfu/g |
| Yeast and Moulds | < 100 cfu/g |
| Salmonella | Negative |
| Escherichia. Coli | Negative |
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