The appearance of red rice red is purplish red liquid or powder. The main ingredient is cyanidin-3-glucoside, a kind of anthocyan. It can dissolve in alcohol and water easily, can not dissolve in acetone and petroleum benzene. It has a good resistance to light and heat, but not to oxidant. Na＋,K＋,Ca2＋,
Ba2＋,Zn2＋,Cu2＋and trace Fe2＋ do not affect the pigment, but the shade of color becomes rose when there are much Sn2＋,and becomes fading and deposition to Pb2＋ and much Fe2＋. The shade of color solution is red when PH is between 1～6, pale brown to yellow when PH is between 7～12
Ba2＋,Zn2＋,Cu2＋and trace Fe2＋ do not affect the pigment, but the shade of color becomes rose when there are much Sn2＋,and becomes fading and deposition to Pb2＋ and much Fe2＋. The shade of color solution is red when PH is between 1～6, pale brown to yellow when PH is between 7～12
Main Products
food additives