The shelf life of Rodinal would seem to be almost forever! I had one glass bottle that was at least 15 years old, black and thick, yet still worked fine. When they [Agfa] changed to the plastic bottles one bottle sat in my d'room for a very long time and was still okay. If you have something really important buy a new bottle .. just in case. It is probably the best keeping developer there is.(posted 9288 days ago)Steve Nicholls