Paraquat methosulfate CAS NO.2074-50-2

Common name Paraquat Product category Herbicide ChemicalName 1,1'-dimethyl-4,4'-bipyridinium dichloride CAS 2074-50-2 Structure Molecular …

Common name Paraquat Product category Herbicide ChemicalName 1,1'-dimethyl-4,4'-bipyridinium dichloride CAS 2074-50-2 Structure Molecular Formula C12H14Cl2N2 Physical and Chemical Properties Colourless, hygroscopic crystals. M.p. Decomposes at c. 340 oC V.p. <1   10-2 mPa (25 °C) KOW logP = -4.5 (20 °C) Henry <4   10-9 Pa m3 mol-1 (calc.) S.g./density 1.24-1.26 (20 oC) Solubility In water c. 620 g/l (20 oC). Practically insoluble in most organic solvents. Stability Stable in neutral and acidic media, but readily hydrolysed in alkaline media. Prevention Object Used to control weeds and grasses in many agricultural and non-agricultural areas.It is used preplant or preemergence on vegetables, grains, cotton, grasses,sugar cane, peanuts, potatoes, and tree plantation areas. Toxicity Oral LD50 values of 110 to 150 mg/kg in rats, 50 mg/kg in monkeys, 48 mg/kg in cats, and 50 to 70 mg/kg in cows. The dermal LD50 in rabbits is 236 to 325 mg/kg, indicating moderate toxicity by this route Formulations 20%SL.42%SL