text: can dmso salt solution be heated up to 60 degree c and maintain integrity? i was making dmso-nacl solution (20%dmso, 0.25m edta, and nacl to saturate) and after about a week a lot of salt precipitated to the bottom of the bottle. so, i heated the bottle of solution in a waterbath at 60c to get some of the salt to go into solution. i noticed that the dmso didn't smell as strong as it normally does. is the dmso solution still good after heating it and should i even have attempted to heat it at all and just used the dmso solution as is with some of the salt precipitated at the bottom? also, what is the shelf life of dmso? 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!