I am new to this and am wondering why one would use additives that say on there MSDS that it should not be inhaled. E-cigs are here to have a safer puff than ye-olde cancer sticks. Just a thought
SoCalLarry, the warning on the RY4 Double (TPA) is just a warning that it can react with plastic tanks and dissolve them. It should be OK to vape. The flavoring probably contain some form of ester, in a low concentration.