TIL. However, the CDC quotes a source saying it’s about half that: > Human data: Ten volunteers exposed for 3 to 5 minutes to 200, 400, or 800 ppm reported mil

TIL. However, the CDC quotes a source saying it’s about half that: > Human data: Ten volunteers exposed for 3 to 5 minutes to 200, 400, or 800 ppm reported mild to moderate irritation of the eyes, nose, and throat at the two higher concentrations [Nelson et al. 1943]. The probable lethal oral dose has been reported to be 190 grams [Gosselin et al. 1984]. https://www.cdc.gov/niosh/idlh/67630.html https://www.cdc.gov/niosh/idlh/67630.html IPA has a density of 0.786 g/cm3 (20 °C) (per Wikipedia), so that’s 190/0.786 = 242 ml (about 8 oz).