| Physical and Chemical Properties | Chemical properties Red powder or liquid (propylene glycol, etc.). Soluble in water and ethanol, insoluble in acetone and petroleum ether. It has good stability, heat resistance, light resistance, and storage resistance, but it is sensitive to oxidants. Sodium, potassium, calcium, barium, zinc, copper and trace iron ions have no effect on it, but it turns rose red when tin is encountered, lead and a large amount of Fe2, will fade and precipitate. Acid resistance, pH 1~6 is red, pH 7~12 can become light brown. Heat for a long time to turn yellow. The main component is cornflower -3-glucoside (red), which is an anthocyanin pigment. |
| Use | Use colorant (red). Mainly used for acidic foods such as beverages. As a food colorant, China's provisions can be used for candy, wine and ice cream, according to the production needs of appropriate use. |
1. it is prepared by extracting, filtering and concentrating high-quality red rice (such as jiangsuxiang snow rice, duck blood glutinous rice, Yunnan black rice, Guizhou black glutinous rice, Guangdong black youmi and Shaanxi black rice). the main component is anthocyanin of cyanidin.
2. The red or black seeds in rice (Oryza sativa), namely red rice (such as Jiangsu Xiangxue Nuo, duck blood glutinous rice) and black rice (such as Shaanxi black rice, Guizhou black glutinous rice, Yunnan black rice, Guangdong black yumi, Sichuan dwarf black glutinous rice), the rice skin when the brown rice is processed by a rice mill to make refined rice is used as raw material (about 10% of the total brown rice), after dissolving, the pigment is extracted with aqueous ethanol or warm water and weakly acidic aqueous solution, and then filtered and concentrated.