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So Ultra high purity stamped argon (99.9999) is twice the price of industrial argon used for welding. Food grade Argon is actually half the price of industrial

So Ultra high purity stamped argon (99.9999) is twice the price of industrial argon used for welding. Food grade Argon is actually half the price of industrial argon. See https://www.airgas.com/product/Gases/Argon/p/AR%20FG300 https://www.airgas.com/product/Gases/Argon/p/AR%20FG300 vs https://www.airgas.com/product/Gases/Argon/p/AR%20300 https://www.airgas.com/product/Gases/Argon/p/AR%20300 vs https://www.airgas.com/product/Gases/Argon/p/AR%20UHP300 https://www.airgas.com/product/Gases/Argon/p/AR%20UHP300

DannyBee 2y ago
In the case of Argon, it's both inert and non-toxic. The main danger is that it's heavier than air (so you can asphyxiate yourself if you try). As such, "food" grade argon is actually less pure than industrial argon - food grade is 99.996 and industrial grade is 99.998 The practical difference is what contaminants exist - because argon is non-reactive, in food grade argon they are just trying to remove contaminants you don't want in food. In industrial grade argon, mainly used for welding, almost any kind of impurity can cause issues, whether it would be "safe to eat" or not.