ptoluenesulfonovou
p-Toluenesulfonic acid, often abbreviated as TsOH or PTSA, is a strong organic sulfonic acid with the chemical formula CH3C6H4SO3H. It is a white solid that is soluble in water and polar organic solvents. Its structure consists of a benzene ring substituted with a methyl group and a sulfonic acid group, with these substituents in a para (1,4) position relative to each other. It is commonly encountered as its monohydrate form, CH3C6H4SO3H·H2O.
p-Toluenesulfonic acid is widely used in organic synthesis as an acidic catalyst. Its strength as an acid,