I would assume that it will be fine. Try it topically. It will smell strong like an old garlic. When placed on the skin..just rub a good portion of your thigh with it or your arm, and you should be able to taste it. Most things are not disturbed by freezing, heat is the greater concern.
Now becareful when using DMSO to an infected site... a little dab will do ya. Repeated applications can feel like a burn or if too much is applied to a raw or ill tissue. Fear not if you experience this.. it should fade in hours at least.
2.5 cc is the usualy IV administration in about 200cc of saline... just for reference
"Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth." Marcus Aurelius