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Published on: March 27, 2019
Properties of aqueous methanesulfonic acid: complex index of refraction and surface tension
Cathrine E Lund Myhre1, Barbara D'Anna, Flemming M Nicolaisen
1Department of Chemistry, University of Oslo, PO Box 1033 Blindern, N-0372 Oslo, Norway.
Abstract:
The complex index of refraction of aqueous methanesulfonic acid (MSA) at room temperature and at concentrations of 1-70 wt. % is presented. The complex index of refraction is obtained in the entire wave-number region from the mid infrared to the ultraviolet-visible regions. An analysis of the infrared spectra reveals a single absorption band, which makes it possible to identify MSA in aqueous H2SO4. The surface tension of 1-99-wt. % aqueous MSA from room temperature to approximately 263 K, depending on the concentration of MSA, is reported. A polynomial parameterization of the surface tension in terms of acid weight fraction and temperature is presented.
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