p-Toluenesulfonic Acid

p-Toluenesulfonic Acid

p-Toluenesulfonic acid (PTSA), or tosylic acid (TsOH), is a corrosive, toxic, solid, strong organic acid. In monohydrate form, its formula is TsOH·H2O. Available in various quantities, PTSA is used as an organic-soluble acid catalyst in organic synthesis.
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