The Acid dyes we deal in are the salt of a sulfuric, organic, carboxylic and phenolic acid. The said colorants are typically soluble in water and are included with affinity for amphoteric fibers as well as cellulose fibers. Acid dyes are functional as the excellent dyed materials, which can be included to dyeing baths. Also, the dyes can boost the number of protonated amino-groups in strands. The said colorants are highly effective on protein fibers, mohair, wool and alpaca. Also, these are made to make effects on the silk. They are effective in coloring the synthetic fibers. The dyeing of synthetic fibers is so simple and effective with the utilization of the provided dyes.