Almost once a month someone comes here and asks about whether old film
or chemistry is still good. The only answer is to try it. Usually,
though, it is not worth risking old material on important subjects.
Personally, I would pitch it. The time it takes to test the material is
worth far more than the material itself. What's an hour or two of your
time worth?

Throw it out.

Mix it up and see if it's discolored. Unlike Xtol all other developers
tend to change color when oxidized. I wouldn't look for it to keep
long after mixed though.

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        John - Photographer & Webmaster
     www.puresilver.org - www.xs750.net