Dimethyl sulphoxide. Much used as a solvent for substances that do not dissolve easily in water and that are to be applied to cells (for example cytochalasin B, formyl peptides), also as a cryoprotectant when freezing cells for storage. It is used clinically for the treatment of arthritis, although its efficacy is disputed.
Dimethyl sulfoxide (DMSO) is a solvent made from wood pulp. Its therapeutic uses are based on its ability to penetrate the skin. Its use remains controversial but it is very effective at carrying substances though the skin. Found on http://www.encyclo.co.uk/local/21512