I'm no authority on co2 but if there were non desirable gasses or otherwise in a bottle supplied to a fire safety company I'm sure it could lead to disastrous events...
If you are unsure ring them but don't go on what another person heard on another forum about dome guy who knows a guy who's cousin is an authority on gas....
I've been using this gas for near 3 years and I'm ok. Beer is fairly good if I do say so....
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