I am looking at several MSDS from 2013 that state isopropanol has a health rating of 1, yet when I look at the 2017 NFPA edition, the data clearly indicates that it is level 0 (LD50 (oral and dermal) over 2000mg/kg and LC50 well over 10,000ppm).
Why would these reputable companies state that the health rating is 1?? I am unsure of which value to use for our storage tanks and I do not want to choose the wrong one.
Here are the numbers...please confirm which health rating it should be assigned:
LD50 (oral) = 4,420 mg/kg
LD50 (dermal) = 13,000 mg/kg
LC50 = 16,970 ppm
LD50 (oral) = 3,360 mg/kg
LD50 (dermal) = 12,800 mg/kg
LC50 = 16,000 ppm