Refractive index database

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Optical constants of C2H6OS (Dimethyl sulfoxide, DMSO)
Kozma et al. 2005: n 0.237–0.641 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]



22 °C


I. Z. Kozma, P. Krok, and E. Riedle. Direct measurement of the group-velocity mismatch and derivation of the refractive-index dispersion for a variety of solvents in the ultraviolet, J. Opt. Soc. Am. B 22, 1479-1485 (2005)


[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]


Dimethyl sulfoxide, C2H6OS (DMSO, Me2SO)

Dimethyl sulfoxide (C2H6OS, DMSO, Me2SO) is a highly polar organic solvent with a wide range of applications. It is a clear, colorless liquid that is miscible with many organic solvents and water. Due to its ability to penetrate biological membranes, DMSO is frequently used as a solvent in biological studies and as a carrier for drug delivery. It also has anti-inflammatory properties and has been used in various medical applications, such as a treatment for pain and inflammation associated with certain conditions. In the industrial sector, DMSO is used as a solvent in chemical reactions, and in the electronics industry, it serves as a photoresist stripper and cleaner.

Chemical formula


Other names

  • Methanesulfinylmethane (substitutive)
  • Dimethyl(oxido)sulfur (additive)
  • Methylsulfinylmethane
  • Methyl sulfoxide

External links