Ethyl Para-Toluene Sulfonate is an aromatic sulfonate ester with the chemical formula C₉H₁₂O₃S. It is derived from p-toluenesulfonic acid and ethanol, where the sulfonic acid group is esterified with an ethyl group.
This compound is widely used as an alkylating agent in organic synthesis due to the presence of a good leaving group (the tosylate group). It readily participates in substitution reactions, making it useful for introducing ethyl groups into various chemical compounds.
 
 
Applications: Used as an alkylating agent in organic synthesis. Widely applied in the production of pharmaceuticals, agrochemicals, dyes, and specialty chemicals,
Appearance:  Colorless to pale yellow liquid
Solubility:  Insoluble in water
pH Range: Not applicable 
Chemical Formula: C₉H₁₂O₃S
Cas. No: 80-40-0