but I don’t suppose you can expect much from someone who thinks inhaling industrial NO2 is a good idea*
Industrial grade No2 is mixed with sulphur (dioxide?) to specificaly make it toxic for human consumption, but still good for industrial applications or making your car go faster.
This stuff must be food grade or medical grade, AKA pure.
I’m guessing these are imported as there no way you could legitematley buy that with that branding.