[Source]:derived from the infused and refined purple tuberous root of purple sweet potato which is an ipomoea.
[Chemical composition]:anthocyanosides and flavonoids ect.
[Properties]:red-mauve powder and liquid with slight characteristic odor;soluble in water and ethanol water,insoluble in grease;its acid water solution is table,with red and mauve colors;its neutral water solution is indigo;its alkaline solution is blue;resistant to light and heat.
[Application]: coloring agent(mauve). Mainly used in the coloring or color compensation for foodstuff like cakes,salted products,fruit jam,maltose products and fruit wine and juice ect.