Co2 - food grade

[Manngold]

Recently purchased some of the mini kegs that have a mini co2 regulator and they take a threaded co2 bulb. Does Co2 need to be good grade? Are there any risks with using those that aren't?

Thanks

[oz11]

I buy in bulk from from these guys. But I use mini kegs extensively.

[oz11]

Ah, I see you said threaded bulbs, and the ones on the site I linked to say food grade for the unthreaded bulbs, but don't specify for the threaded one...curious!

[McMullan]

Yes, for carbonating beverages, it should be 'food grade'. I've brought this issue up one or twice only to hit a wall of opinionated ignorance. Being 'reliably informed' by someone's mate who works in a welder's supplier 'CO2 is CO2'! Of course CO2 is CO2, but it really should be QC'd to demonstrate its suitability for carbonating beverages. Note the historical recalls in industry! I mainly condition naturally, because my CO2 supply isn't QC'd, unlike Sodastream bottles

[reddibaggie]

I have no idea about the ins and outs of whether it’s ok, but I’ve got a huge torpedo bottle of non food safe co2 I’ve been using for over 3 months now, and I’m not dead yet. I don’t have any odd tastes or anything out of the ordinary in the beer either.


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[Secla]

Isn't it something to do with the cylinder it's in rather than the co2 ? Sure I read that somewhere

[sonicated]

I believe fire extinguishers have a dip tube which can cause problems with the regulator as liquid CO2 comes out. I still wouldn't use a non-food grade CO2 though - not everything kills you straight away!