Synonyms: 1,1'-Dimethyl-4,4'-bipyridiniumdichloride (6CI,7CI);4,4'-Bipyridinium, 1,1'-dimethyl-, dichloride (8CI,9CI);1,1'-Dimethyl-4,4'-dipyridinium dichloride;1,1'-Dimethyl-4,4'-dipyridyliumdichloride;AH 501;AH 501 (herbicide);Cekuquat;Cyclone Max;Dimethylviologen chloride;Galokson;Gramixel;Gramoxone;Gramoxone D;GramoxoneInteon;Gramoxone Max;Gramoxone S;Gramoxone W;Gramoxone dichloride;Methylviologen;Methyl viologen dichloride;Methylviologen chloride;N,N'-Dimethyl-4,4'-bipyridinium dichloride;N,N'-Dimethyl-4,4'-dipyridyliumdichloride;OK 622;Paragreen A;Paraquat;Paraquat dichloride;4,4'-Bipyridinium,1,1'-dimethyl-, chloride (1:2);