有吸湿性。性质不稳定。不溶于水，溶于乙醇、乙醚、苯等许多有机溶剂。乙基化试剂。乙酸纤维韧化剂。 在医药工业中用来生产溴苄铵，还用作感光材料的中间体。该品是乙酸纤维的韧化剂。 Ethyl p-toluenesulfonate was used in a study to develop a fast and accurate method for determination of residues of some common alkylating agents employed in drug synthesis by in situ derivatization–headspace–gas chromatography–mass spectrometry. Ethyl p-toluenesulfonate was used to develop an extraction method for methyl and ethyl esters of various sulfonic acids in active pharmaceutical ingredients using solid-phase microextraction coupled to GC/MS in the selected ion monitoring mode.