Sealed cans usually lasts a very long time.
If the powders are whitish and not caked, it shall probably be OK.
Anyhow, test with some non important photos upon first use.
Jorge
> I have sealed cans of Ilford Microphen and Acufine of unknown age that
> have been stored at 68 deg. C or lower. I have not found any
> information as to storage life. Does anyone have any references?
> Thanks