The central sulfonyl bond of DHDPS (dihydroxydiphenylsulfone) is characterized by strong electron withdrawing properties and chemical stability. Furthermore, the hydroxyl group of DHDPS has higher acidity compared to ordinary phenolic compounds such as phenol, cresol, dihydroxydiphenylpropane and tannic acid, and its hydrogen bond strength is used in various fields. For example, in the past, it has been used as a heat-resistant super engineering plastic monomer, taking advantage of its chemical stability, in dyeing aids (nylon fix agents) and thermal paper developer.