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These Sweet potato red is natural edible pigment extracted from purple sweet potato. Its main compositions are anthocyanin and flavones. The purple red liquid or powder is easy soluble in water and solution of water and alcohol, but insoluble in oil and absolute alcohol. The hue and stability : The hue is influenced by PH value. In acidic condition it is stable red or purple red; in neutral condition it is blue; in alkaline condition it is unstable green.
These Sweet potato red is natural edible pigment extracted from purple sweet potato. Its main compositions are anthocyanin and flavones. The purple red liquid or powder is easy soluble in water and solution of water and alcohol, but insoluble in oil and absolute alcohol. The hue and stability : The hue is influenced by PH value. In acidic condition it is stable red or purple red; in neutral condition it is blue; in alkaline condition it is unstable green.
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