The organoiodine compound erythrosine is an important food coloring agent.

有机碘化合物赤藓红是重要的食用色素。

Food coloring (optional).

食用色素(可选)。

Karo syrup and food coloring?

玉米糖浆跟色素吗？

Add a few drops of food coloring.

添加几滴食用色素。

Monascus Colour is a kind of natural food coloring.

红曲色素是一种天然食用色素。