GB/T 25798-2010 "Classification of Textile Dyeing and Finishing Auxiliaries" is a fundamental classification standard in the textile industry, stipulating unified classification rules for textile dyeing and finishing auxiliaries. The standard applies to the classification of auxiliaries used in processes such as fiber spinning, pretreatment, printing and dyeing, finishing, and general dyeing and finishing. It categorizes auxiliaries into five major classes based on their application scope and process stages, with further subdivisions into series under each class. The classification covers various auxiliaries, including spinning oils, scouring agents, leveling agents, softeners, and others. It does not specify requirements for related testing instruments. The standard provides a unified basis for product naming, production application, scientific research, education, and technical exchanges in the industry, addressing the issue of chaotic classification of auxiliaries.