Sodium xylenesulfonate CAS 1300-72-7 is a white or light yellow liquid, belonging to surfactant, soluble in water, pH 1% solution 7.0, viscosity, MPA · S10 [7]; is 2.7mm2/s at 20 ℃, mainly used as a coupling agent, solubilizer, cloud point reducer, washing aid, dispersant, emulsifier, water-soluble promoter and viscosity regulator.