I don't think it is a good idea to use oxidized Rodinal stock. You may get buy this time, or next or even next and next, but one day you will find that your film will be severely underdeveloped due to deterioation of chemicals.(posted 8595 days ago)The deterioration may come suddenly, and by Murphy's law, the film it destroy will be the film you value the most
Developer is dirt cheap; some images are not replaceble. My two drops of Rodinal