Purple sweet potato (Ipomoea batatas (L.) Poir. Bindweed Convolvulaceae Ipomoea) also known as black potato,potato flesh purple to deep purple. It addition to the ordinary potato nutrients, but also rich in selenium and anthocyanins and anthocyanidins. Purple sweet potato is one of the main raw material of anthocyanins and anthocyanidins.

5. Purple Potato embody affluent nutrition of Selenium and anthocyanidin.

1.It is fit for dyeing or complementary color of wine, soda pop, fruit drink, jam, candy and so on;

2.It can take place of chemosynthetic pigment and produce colourful drugs in drugs industry.