| ITEMS | STANDARD |
| Appearance | Crystalline Powder |
| Color | Yellow or greenish-yellow |
| Particle Size | 100% through 80 Mesh |
| Loss on Drying | 5.5-9.0% |
| Residue on Ignition | < 0.5% |
| Impurity quercetin | < 5.0% |
| Heavy Metals | < 20ppm |
| Assay (Anhydrous substance) by UV | > 95.0% |
| Total Plate Count | < 1,000cfu/G |
| Yeast & Mold | < 100cfu/G |
| E.Coli. | Negative |
| Salmonella | Negative |