1,3 Propane sultone (1,3 PS) CAS No: 1120-71-4 Assay: 99.99%min. 1) ... Grade 2)Electronic Grade 1,3 Propane sultone (1,3 PS) 1)Pharmaceutical Grade CAS No: 1120-71-4 Molecular formula ... Refractive index: 1.4500+ 0.001 Main application: 1,3-PS is an important additive for medical, also as for brightener ...