ubt from what i've read its not pure h2 that would come out but h2s which is poisonous.....with the nervous system being the most effected if durations of inhaling or constant exposure occur.....
True, H2s in large amounts is deadly. .As most combustable gases are in one form or another.
The sodium sulfate only reacts with oxygen. The h2s is produced as the sodium sulfate degrades. Does not effect the H2 in the hho gas. The amount of H2s should be small as most of it should stay in solution in the bubbler and what is present will be combusted.
I plan on "borrowing" the portable gas analyzer from work this weekend to run some test. If there is any intrest I will post my results>