Not the one I found before, but it gets a different point across! (I’ll continue digging about the one I saw about it actually breaking down the base material itself [AlN])
Source: https://chemiday.com/en/reaction/3-1-0-520
Also, 120C translates to 248F.
150C = 302F. So well within the temps most of us vape at!!
Water = a SERIOUS no no for use with this or any other atty that uses Aluminum Nitride!!! Given there’s no way to know what companies use DW to thin the mix (or flavors), I’d strongly recommend against this for those buying retail e-liquid. And extreme caution at a bare minimum for those who DIY. YMMV.