[pure-silver] Opinions on chemistry longevity

Someone recently gave me 10 unopened 125ml bottles of Rodinal. These are old enough that the boxes are not the current mostly-red box, but a box that is mostly white, with a red band with white letters "AGFA", then a green band with black letters "RODINAL". I see nothing on the box or on the bottle to indicate a date.

How long could you reasonably expect Rodinal to remain good in an unopened container?

I was also given quite a bit of old Koday dry chemistry (D-11, D-76, etc.) If the bags did not get wet, do they decay enough so that 20 years is too long to expect use?

I also got a glass amphule (sp?) of Gold Chloride that looks to come from the 1960's. Could that still be good?

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