Curcumin is a diarylheptanoid. It is the principal curcuminoid of the popular South Asian spice turmeric, which is a member of the ginger family (Zingiberaceae). Turmeric's other two curcuminoids aredesmethoxycurcumin and bis-desmethoxycurcumin. The curcuminoids are natural phenols that are responsible for the yellow color of turmeric.

Curcumin can exist in several tautomeric forms, including a 1,3-diketo form and two equivalent enol forms. The enol form is more energetically stable in the solid phase and in solution.

1.Turmeric extract mainly used as flavor additive to pigments and foods

2,Turmeric Extract has a good performances such as anticancer, anti,inflammatory  antioxidation, antimutagenics, Lipoidemia reducing and etc.

3.Turmeric Extract used as a food coloring since it normally gives food (slightly yellow color) is used to protect food products from sunlight

4. The curcumin/polysorbate solution or curcumin powder dissolved in alcohol is used for water-containing products. Over-coloring, such as in pickles, relishes, and mustard, is sometimes used to compensate for fading.