... -4,4'-bipyridinium (paraquat)1,1'-dimethyl-4,4'-bipyridinium dichloride (paraquat dichloride)CAS RN[4685-14-7] (paraquat)[1910-42-5 ... formula: C12H14N2 (paraquat) C12H14Cl2N2(paraquat dichloride)Molecular weight: 186.3 (paraquat) 257.2(paraquat dichloride)Properties:Paraquat dichloride forms colorless, hygroscopic crystals, decomposing ...