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