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 |