Dimethyl Sulfoxide (DMSO)Dimethyl Sulfoxide (DMSO) ReagentPlus, 99. 5% Synonym(s): DMSO; Methyl sulfoxide Empirical Formula: C2H6OS Formula Weight: 78. 13 Linear Formula: (CH3)2SO MDL Number: MFCD00002089 Purity: 99. 5% Boiling Point: 189 C(lit.) Melting Point: 16 19 C(lit.) Density: 1. 10 g mL(lit.) Refractive Index: n20 D 1. 479(lit.) Beilstein Registry Number: 506008 RTECS No.: PV6210000 RIDADR: NA 1993 PGIII Specifications: Mfr. No. D5879 1L Dimethyl sulfoxide Reagent