I can confirm that. My supplies are stored in my basement in a corner closet which is not insulated. In the winter the temp there creeps down towards 50*F, and it was cold enough to crystalize my open bottle of Rodinal.
The developer still worked fine, careful just not to pour the crystals into the mix, as it might damage the film emulsion (although I doubt it). I extract my 20ml with a syringe.
Apart from that, I've had Rodinal sitting on my shelf for two years in an opened bottle, and what comes out is a darkbrown slur, but it seems to work great anyway.
Originally Posted by modafoto