Aniline dyes are synthetic colorants derived from aniline, a compound made from coal tar. These dyes are known for their vibrant colors and are commonly used in textiles, paper, and leather industries. They can produce a wide range of shades and are often favored for their ability to bond well with fabrics. The discovery of aniline dyes in the mid-19th century marked a significant advancement in the dyeing process. Unlike natural dyes, which come from plants or animals, aniline dyes are more consistent and easier to produce. However, some aniline dyes can be toxic, leading to safety concerns in their use.