MEK has the distinction of being the only material I know of that was simultaneously on both the FDA's "generally recognized as safe" food ingredients list and

MEK has the distinction of being the only material I know of that was simultaneously on both the FDA's "generally recognized as safe" food ingredients list and the EPA's "hazardous air pollutants" list, for which no safe emissions level is recognized. It did eventually get removed from the second. As far as I know, there has never been a fatality attributable to MEK exposure. https://en.wikipedia.org/wiki/Methyl_ethyl_ketone#Health_effects https://en.wikipedia.org/wiki/Methyl_ethyl_ketone#Health_eff...