Grape skin color powder 

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 ITEMSPECIFICATION
SmellCharacteristic
ColorRed to purplish-red
AppearanceFine 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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