Synonyms: 1,1'-Diheptyl-4,4'-bipyridiniumdibromide (7CI); 4,4'-Bipyridinium, 1,1'-diheptyl-, dibromide (8CI,9CI); 1,1'-Di-N-heptyl-4,4'-dipyridiniumdibromide; Diheptylviologen bromide; Diheptylviologen dibromide; Heptylviologenbromide; Heptylviologen dibromide; N,N'-Diheptyl-4,4'-bipyridinium dibromide;N,N'-Diheptyl-4,4'-dipyridinium dibromide; N,N'-Diheptyl-4,4'-dipyridyliumdibromide