In my experience DMSO does NOT freeze when diluted significantly. No, I = don't know the % of dilution at which it stops but it's less than 50%..=20 DMSO is hygroscopic; if left uncovered it will often attract enough=20 moisture from the atmosphere to refuse to freeze at 67=BAF. Someone on the DMSO list said that filtering with 2-micron filters helps = odor tremendously. I haven't bought any so cannot verify and I didn't=20 notice much difference after I'd used 5 coffee filters. (wellll, it was=20 worth a shot.)

On 7/27/2012 10:46 AM, Dan Nave wrote: > It freezes in the refrigerator, not the freezer. You don't want to=20 > get it cold enough to freeze the water. Also, it works better if=20 > there is not too much water in the mix. I don't know if it would work = > with 50% DMSO and 50% water, for instance. > > Dan