What Is Curcumin
Curcumin is a yellow pigment extracted from the rhizomes of ginger-planting plants and other rhizomes. It is acidic polyphenols, and the main chain is unsaturated impotence and aromatic groups. It is usually used for meat foods and acid-base indicators, while it has pharmacological effects such as anti-inflammatory and antioxidant.

Physical and Chemical Nature
Curcumin is an orange-yellow crystal powder, which is slightly bitter. It can be demonstrated in water, soluble in ethanol and propylene glycol, and easily dissolved in ice acetic acid and alkaline solution. It is reddish brown in alkaline and yellow in neutral and acidic. The stability of the reducing agent is strong, and the color is strong. It is not easy to refund the color once it is colored, but it is sensitive to light, heat, and iron ions.

Because the ends of contain molecules have two hydroxyl groups, the co-effect of electronic cloud deviation under alkaline conditions, so when pH is greater than 8, contain will change from yellow. Modern chemistry uses this performance of curcumin as a pH indicator.

Product Usage
1. Curcumin can be used as an edible yellow pigment. Curcumin is usually used in the coloring of drinks, candy, pastry, intestinal products, dishes, sauce products, canned foods, and coloring cosmetics and medicines.
2. Curcumin can be used as a pH indicator. When the pH value is 7,8, it is displayed as yellow, and when the pH value is 9.2, it is displayed as reddish brown.
3. Curcumin is often used in food, dishes, pastries, candy, canned beverages, cosmetics, and medicine.

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