Grape skin color powder is a general designation of effective active ingredients extracted from grape skin. It is a kind of multi hydroxy phenolic compound, containing resveratrol, polyphenols, etc.
| ANALYSIS ITEM | SPECIFICATION |
| Smell | Characteristic |
| Color | Red to purplish-red |
| Appearance | Fine Powder |
| Loss on Drying | ≤8% |
| Lead (Pb) | ≤2ppm |
| Arsenic (As) | ≤3ppm |
| Sulfur Dioxide | ≤500ppm |
| Color Value (E1%, 1cm, 515~525nm) | ≥10 |
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