I agree. But the chemical is not chemically bonded to the liquid it is in, therefore you should not have to heat it nor could it crash. Its not like gear where the molecules are bonded. The chemical is only suspended in the liquid, that's why if you shake it up you are good to go. Also some chemicals that contain larger molecules, you can actually see the chemical suspended in the liquid.
His nolvadex may be good, yea it may not have gotten hot enough to damage it but it may be degraded being exposed to constant differences in weather. Sometimes here we have a variance of 40 degrees im a single day, my mailbox can go from cold to hot and back again. Then again the chemical maybe fine. I say order a backup in case, its cheap insurance.