Quote Originally Posted by AndrewH
My first answer would be Rodinal, it would never go bad. My second answer would be Xtol, because it is a good source of vitamin c ;-)
I hate to tell you, but XTOL has no vitamin C. It uses isoascorbic acid AKA erythorbic acid or d-ascorbic acid, the mirror image of vitamin C which is l-ascorbic acid. Your body looks at it and tells it to go away. The empirical formulas are the same: C6H8O6, but our bodies can tell the difference. I have used both in developers and find no difference so far as film and paper are concerned.

I know you weren't seriously considering drinking XTOL.