Hmm - it wont cause me to re access as i did a window sill test a couple of years ago with pg and vg nic 100mg salts, after 3 months the pg was noticeably darker - I wonder if the same holds true of salts vs FB.
Out of sheer curiosity I left 2ml of both salts and freebase sit on my east window sill July through September. Both were 100mg pg base; salts turned bright orange and the freebase turned medium brown. Couldnāt bring myself to try the freebase but used the salts in a grape mix and the juice tasted fine. Both had some odor but the freebase odor was worse.
Before I gave up on Salts, I did a few unscientific tests similar to you guys, and had about the same results compared to Freebase. Freebase readily oxidized much more than the Salts. Iāve always used Nudeās PG over VG recommendations as I keep everything in the freezer, and buy liters at a time. I thought I read somewhere that the chemical changes IN Salts helped to slow oxidation compared to Freebase, which it s also what your / our tests seem to prove.
Thatās exactly what I do