... ,3-PS Pharmaceutical intermediate1,3-PSAs an intermediate for the synthesis of electroplating intermediates and pharmaceutical intermediates; ... (%)≥99.0Melting point 30-32°CApplicationan important intermediate for the synthesis of pharmaceutical intermediates,brightening agents,surfactants ... , Q75, Propargyl Chloride, Basic Chromic Sulfate, Chromiun Nitrate.... hot sell for 1,3- PS cas no. 1120-71-4. ...