Exactly. I got the same papers with my order: one which said it was quality SN and another sheet which said it was sodium chloride. Thank you for responding (and apologies for quoting you without permission), but I felt your test was a valid counterpoint to recent posts saying TIG SN won't work. While I haven't seen specific evidence of a TIG CTB, there seems to be some evidence it is pure.
I suppose I could be the guinea pig but would then not have the satisfaction of coming back and saying "Told you it might work! I CTB'd last night!" Also, the alternative of it not working would be a major drama in my life as it stands right now. My "not ready for CTB" status makes me an observer who merely wants to put together an informed decision if the time ever comes.