Synonyms: 4,4-Bipyridinium, 1,1-dimethyl-, bis(methyl sulfate);Paraquat dimethylsulfate;Paraquat I;Paraquat dimethyl sulfate;1-methyl-4-(1-methylpyridin-4-yl)pyridine; sulfonatooxymethane;1,1-Dimethyl-4,4-bipyridynium dimethylsulfate;OK 621;1,1-Dimethyl-4,4-bipyridinium bis(methyl sulfate);Paraquat bis(methyl sulfate);Gramoxone methyl sulfate;Paraquat-dimethylsulfate;1,1-Dimethyl-4,4-dipyridinium di(methyl sulfate);PP 910;Paraquat dimethyl sulphate;4,4'-Bipyridinium,1,1'-dimethyl-,bis(methyl sulfate);Paraquat methylsulfate;Paraquat bis(methylsulfate);