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Dimethyl Sulfoxide

Whether you need HPLC dimethyl sulfoxide, ACS Spectrophotometric dimethyl sulfoxide, Anhydrous dimethyl sulfoxide or another Sigma-Aldrich grade, we stock the right product for your application. As a leading supplier of high-purity, research grade solvents, we have the DMSO to meet your exact needs.

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 Dimethyl Sulfoxide Physical Property 
Synonym Methyl sulfoxide Beilstein Registry 506008
Molecular Formula (CH3)2SO EG/EC Number 2006643
Molecular Weight 78.13 MDL Number MFCD00002089
CAS Number 67-68-5 Vapor Pressure 0.42 mm Hg (20°C)
Density 1.100 g/mL at 25ºC Dielectric Constant 47.24 at 20ºC
Boiling Point 189ºC Dipole Moment 3.960
Melting Point 16-19 ºC UV cutoff 265 nm
Flash Point 85.0°C Refractive Index 1.479 at 20ºC
Viscosity (cP)  1.987 at 25°C Vapor Density 2.7 (vs. air)
Signal Word Warning Hazard Statement H227
    Precautionary Statement P210-P280-P370 + P378-P403 + P235-P501
Dimethyl Sulfoxide Miscibility / Immiscibility Table