While some CO2 manufacturers produce all grades (making them relatively the same) others do not. Some CO2 providers have the spec sheets from the manufacturer of the CO2 they purchased. If you only look at the Purity percentage, not the Grade, you could be ingesting harmful and potentially cancer causing chemicals. Industrial Grade has to meet a certain percentage purity, but the impurities can include Ammonia, or something worse. For instance, Food Grade is different from Beverage grade, because food grade has to have low O2 levels. The the "Grade" has to do with what else is in there besides CO2. people may want to know.ĬO2 is sold by both "Grade" and "Purity." Simiply looking at the purity percentage is not enough. Adding a post to the end of this very old thread.
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