topical vit C with DMSO?

[Guest guest]

I have been dissolving vit C powder in 60% DMSO and applying it

topically. It seems to work extremely well for my purposes (knee

pain, and for delivering vit C topically).

But I recently read that topical vit C preparations can become

harmful if not stored in the refrigerator.

So I'm wondering how should I be storing the C/DMSO mix? In the

fridge? Will the vit C/DMSO become harmful if not refrigerated?

Should I be mixing only enough for immediate application?

If anyone else has used this type of mix, please give me any opinions

thanks,

sol