Common Name: Fipronil Chemical Name: (¡¨¤)-5-amino-1-(2,6-dichloro-a,a,a-trifluoro-p-tolyl)-4-trifluoromethyl sulfinylpyrazole-3-carbonitrile Molecular Formula: C12H4Cl2F6N4OS Molecular Weight: 437.2 Physical Chemistry: Form White solid. M.p.200-201; (tech, 195.5-203) V.p. 3.7¡¨¢10-4mPa(25); Kowlogp=4.0(shake flask method); Henry 3.7¡¨¢10-5Pam3nol-1(calc.); S.g./density 1.477-1.626(20). Solubility in water 1.9(pH5), 2,4(pH9), 1.9(distilled)(all in mg/l, 20). In acetone 545.9, dichloromethane 22.3, hexane 0.028, toluene 3.0(all in g/l, 20). Stability Stable in water at pH 5 and 7; slowly hydrolysed at pH9(DT50 c.28d). Stable to heat. Slowly degrades in sunlight (c.3% loss after 12d continuous irradiation); rapidly photolysed in aqueous solution (DT50 c.0.33d). Use: Control of multiple species of thrips on a broad range of crops by foliar, soil or seed treatment. Control of corn rootworm, wireworms and termites by soil treatment in maize. Control of boll weevil and plant bugs on cotton, diamond-back moth on crucifers, Colorado potato beetle on potatoes by foliar application. Control of stem borers, leaf miners, planthoppers, leaf folder/rollers and weevils in rice. Foliar application rates range from 10-80 g/ha; soil treatment rates 100-200 g/ha. 5%SC 200L/Iron drum; 97%TECH, 80%WDG: 25kg/Fiber drum.
