You would know if you had any reasonable education in organic chemistry, that on it's own, stored sealed, dry and in the dark, there is not much that
thiodiglycol can do with itself.
If oxygen can get in, then so can water, and in that case there might be some oxidation. If it is stored in a metal container then again, there might
be some reaction. But on pure, its own, it should be stable indefinitely. |