A dispersant for textile dyes is a crucial auxiliary agent in the dyeing process of synthetic fibers like polyester, primarily functioning to maintain disperse dyes in a stable suspension within the dye bath. As disperse dyes are inherently insoluble in water, they tend to aggregate into large crystalline particles during dyeing, leading to uneven coloration, color differences, and equipment clogging. The dispersant adsorbs onto dye particle surfaces through its surfactant molecules, creating robust steric hindrance and electrostatic repulsion barriers that effectively prevent particle aggregation and sedimentation. This mechanism ensures the dyes remain uniformly dispersed under high-temperature and high-pressure dyeing conditions, enabling smooth migration and penetration into the fiber structure. Consequently, it achieves vibrant, uniform dyeing with excellent fastness while preventing quality issues such as speckling and dye bath contamination, making it an essential chemical in modern textile dyeing processes.