I found an interesting free NIOSH publication concerning recommendations for protective equipment when exposed to chemicals. It is technical so this is something that you will have to read ahead to know how to use. It also gives a listing of what the DOT numbers on placards of transportation equipment mean with a reference to what personal protective equipment is needed. If you scroll to page 379 it will reference a page number which tells what the chemical is including the threat and what protective measures need to be taken. - Bill N.