P-[(4,6-dichloro-1,3,5-triazin-2-yl)-oxy]benzene sulfonic acid sodium salt(TSP) was synthesized by condensation reaction of cyanuric chloride and p-phenolsulfonic acid in the presence of water.The molecular structure of TSP was characterized by FTIR and 1HNMR,then the analysis results showed that cyanuric chloride reacts with p-phenolsulfonic acid to form the target product.TSP was applied to delimed and bated sheep skin.Through the shrinkage temperature and physical sense of the leather,as a basis for evaluating the tanning effect,the reasonable tanning condition was obtained by single factor experiment:100% water,25% TSP(based on the weight of limed sheepskin),the tanning temperature in three stages of 25℃、40℃ and 50℃,and each temperature stage was tanned for 2 hours,the total tanning time was 6 hours and the ultimate pH was kept at 5.5~6.0 by basification.The results indicated that the shrinkage temperature of crust leather could reach 78℃ or so,and the leather had fine white grain and good touch.As a organic tanning agent,the compound has a good application prospect in leather making.