Paraquat Common
Name£ºParaquat
Chemical Name:
¡¡¡¡1,1¡ä-dimethyl-4,4¡ä-bipyridinium
Chemical Structure:
¡¡¡¡
CAS NO.: 4685-14-7
Specification£º42% min
Physical & Chemical Properties£º(technical)
¡¡¡¡Mol. wt. 186.3 M.f. C12H14N2
¡¡¡¡Form Colorless, hygroscopic crystals. M.p. Decomposes at 340¡æV.p.
< 1¡Á10£2 mPa (25¡æ) KowlogP= £4.5(20¡æ),
S.g./density 1.24-1.26(20¡æ) Solubility In water 620g/l(20¡æ). Practically
insoluble in most organic solvents. Stability Stable in neutral and
acidic media, but readily hydrolysed in alkaline media. Photochemically
decomposed by u.v. irradiation in aqueous solution.
Mode of Action:
¡¡¡¡Paraquat is a quaternary nitrogen herbicide widely used for broadleaf
weed control. It is a quick-acting, nonselective compound, that destroys
green plant tissue on contact and by translocation within the plant.
It is also used as a crop desiccant and defoliant, and as an aquatic
herbicide.
Toxicity:
¡¡¡¡Acute oral LD50(Adult Rat)112-150mg/kg, dermal LD50(Rabbit)>210mg/kg.
Inhalation: No vapor toxicity. Extreme exposure to spray droplets
may cause nose bleeding. It has irritation to the eyes.
Formulation: 20%AS,25%AS
