| Assay | Proanthocyanidins: 30, 40, 50; Polyphenols: 20%, 30%, 50%; Resveratrol: 5%, 10% |
| CAS No | 501-36-0 |
| Storage | Store in a cool, dry place. Keep away from moisture and strong light. Do not transport with toxic substances. |
| Shelf-Life | 3 years |
| Color | Brown-red fine |
| Form | Powder |
| Part Used | Mature peel of VitisviniferaL |
| Solubility | Soluble in water and most organic solvents |
| Loss on Drying | ≤ 5.0% |
| Ash Content | ≤ 5.0% |
| Acid-Insoluble Ash | ≤ 2.0% |
| Heavy Metals | ≤ 10 mg/kg |
| Arsenic (As) | ≤ 2 mg/kg |
| Lead (Pb) | ≤ 2 mg/kg |
| Cadmium (Cd) | ≤ 0.5 mg/kg |
| Mercury (Hg) | ≤ 1 mg/kg |
| Total Number of Colonies | ≤ 1000 CFU/g |
| Yeast and Moulds | ≤ 100 CFU/g |
| Salmonella | Negative |
| Escherichia. Coli | Negative |
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