... glucoside & peonidin acyl glucoside. Appearance: Purple sweet potato color powder is red to purple red, liquid is brown purple ... 000Pathogenic Bacteria NegativeNegative Applications and Usage Instruction: Purple sweet potato color can be widely used in wine, beverage, fruit sauce ... , Huangjin Mountain Industrial area, Huangshi City, Hubei, 435000, China purple sweet potato color natural food colouring