That stuff scared me. In fact the postman delivered them and had them sitting in the sun on my front porch! Yikes.
I did the same, and order the 4 quart
bottles and keep them in the fridge. Hey, I like my home to much to chance an explosion.
But seriously, I think the main thing is to keep it from degrading. I know people that keep it in the freezer, no problem. And these are very experienced people with the stuff.