Paraquat 1 : Biology. 1,1'-dimethyl-4-4'-dipyridylium salts, used as a weedkiller. Extremely toxic to human beings and there is no known antidote. (Chambers)
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}