text: Well, DMSO shouldn't smell anyway, if it does that is impurities in the solution like dimethyl sulfide. Anyway, since DMSO is a fairly simple compound with no forces other than covalent holding it together it should be fine at 60C. The shelf life of DMSO I believe is fairly long--as long as its not from the 60s and as long as you keep it in a dark bottle because it is sensitive to light!