P-Toluenesulfonic acidpara-Toluenesulfonic acid (PTSA, pTSA, or pTsOH) or tosylic acid (TsOH) is an organic compound with the formula CH3C6H4SO3H. It is a white extremely hygroscopic solid that is soluble in water, alcohols, and other polar organic solvents. Read from the Chembox of the Wikipedia article P-Toluenesulfonic acid, revision 1379998507.

Property

Value

Formula

C7H8O3S, 172.20 g/mol

Melting point

106 °C

Boiling point

140 °C

Density

1.24 g/cm³

pKa

-1.3

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