Product Name:Purple Sweet Potato Powder,Purple Potato Powder Place of Origin:Shaanxi Province,China Part of Used:Root Appearance:Purple Fine Powder, no lumps, no visible impurities Production Method:AD(Hot Air Drying) Specification:50-400mesh according to customer requests Product Information of Purple Sweet Potato Powder: Purple Sweet Potato powder is produced by purple root tuber of edible purple sweet potato (Impomoea batatas ) planted locally. The process is checking, washing, slicing, extracting, filtrating, purifying, concentrating, sterilizing(purple sweet potato color liquid), spraying & drying(purple sweet potato color powder). The main ingredient is cyanidin acyl glucoside & peonidin acyl glucoside.. It can be dissolved in water & alcohol, propylene glycol solution easily, but not in oil. The color of water solution changes when PH is different. When PH is between2-6, the color is red or purple red .The solution color becomes blue, and is unstable when PH is above 6. The color of solution can''t fade under light for a long time, and also has good resistance to high temperature in an acidic medium.