azo dyes

Azo dyes are a large group of synthetic colorants used to dye textiles, plastics, and other materials. They contain a special chemical group called the azo group, which is a nitrogen-nitrogen double bond (N=N). This structure allows the dyes to produce a wide range of vibrant colors. Azo dyes are popular because they are inexpensive, stable, and easy to produce in various shades. However, some azo dyes can break down into substances that may be harmful or potentially carcinogenic, so their use is regulated in certain food and cosmetic applications.