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 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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