[Origin]: Purple sweet potato red color is extracted and purified from the root of purple sweet potato(Ipomoes batatas).

[Composition]: The pigment mainly consisits of anthocyanins and other flavonoides.

[Characteristics]: Purple sweet potato is a kind of red to purple-red powder or liquid, with a little characteristic odors, soluble in water and ethanol solution, not soluble in oil. The color is red to purple-red and stable when the solution is acidity. Neutral, the color is purple-blue. Alkalinity, the color is blue. It also has a good stability to heat and light.

Item	Powder	Liquid
E1%，1cm,528nm	10-60	8-30
Loss on drying           ≦	10%
Heavy metal               ≦	20mg/kg	20mg/kg
Arsenic(As)               ≦	4mg/kg	4mg/kg
Lead(Pb)                    ≦	5mg/kg	5mg/kg
Total bacteria             ≦	1000个/g	1000个/g
Pathogenic bacteria	None	None

[Application]: Coloring agent(purple-red). It can be applied in cakes, soaked food, jam, candy, fruit wine and fruit juice, etc.