I have half a liter of 24mg unflavored nicotine. I currently vape 12mg. I've dabbled a little with some very simple fruit flavors, but that's all.
Anyone know how long the big bottles of nic can last without being refigerated or frozen? I have mine on the counter and occassionally will fill a tank with some, add some unflavored 0-nic VG, and some conc. flavor. Will just being in the fridge suffice?
If you get USP grade nic liquid, it can go unopened and stored in a cool, dark place for a year or more.
Once you break the seal, you have about six months to use it.
I have a 250ml bottle of 36mg/ml nic that I'm using for my DIY projects. I just popped the seal Friday.
I've found that doing the math is easier with 36mg liquid, since my target nic level is either 12 or 18mg/ml.
Honestly, I think the "expiration" of nic liquid at any level of concentration is extraordinarily conservative. As long as you store the stuff properly, I don't see why the antiseptic qualities of the PG or VG base and the additionally antiseptic (and insecticidal) characteristics of unflavored nic wouldn't make the stuff viable for years. Yes, it may change colors as you introduce Oxygen and light to it, but where is that nicotine alkaloid going to go if it's stored properly?
It's like canned beans. Keep'em stored right and they'll last until the Zombie Apocolypse.
And, you don't have to be a master chef to DIY your liquids. If you have a baby medicine dosing cup and a few empty, clean bottles, then with any of the recipe managers out there DIY liquids are as easy as making a box of Kraft Mac n Cheese or Rice A Roni.