2,5-Dihydroxybenzenesulfonic acid 5-p-toluenesulfonate 2-Hydroxy-5-tosyloxybenzolsulfonsaeure 57775-26-5 Acide sultosilique [INN-French] Acido sultosilico [INN-Spanish] Acidum sultosilicum [INN-Latin] EINECS 260-943-0 Sultosilic acid Sultosilic acid [INN]