Lloyd E. Sponenburgh wrote:
Bob Engelhardt fired this volley in
:

Bleach converts mercaptans just fine, but Bob, you must be living wrong
if you have trouble finding potassium permanganate! It's _everywhere_ as
"green sand" recharging material for iron-removal water filters. ...

Oh yeah, I remember using it for that. Easy enough to get, but awful to
work with - I also remember the indelible purple stains G.

I differ with you on the idea of cutting into an "unknown" propane tank,
though. You can't know if someone has introduced air into it. If they
did, you have a bomb on your hands (and "bombs are us", since I'm in that
business).
....

Introduced air in the tank cannot create a bomb condition. A good old
whoosh for sure, but not a bomb. Pure oxygen would have to be added for
that.

Bob