@Sld and those researchers also don't keep it in refrigerator. Room temp in dark cool cabinet in a ziplock. It's manufacturer's recommended storage method BTW.
Sorry to say but your questions show you spent little to no time in gathering knowledge required to be a "sovereign" researcher. If people want to be self sufficient they ought to do their homework before starting ANY research and buying anything.
Thank you for your reply. I have read and researched and am still doing so. Only using Tirz on my rat once a week since Jan. I have used my BAC which has been stored in the fridge for longer than suggested and follow what you recommended, BUT, I still ask questions that may seem dumb or like I have not researched because opinions are so varying.