Tribenuron-methyl

COMMON NAME: Tribenuron-methyl CHEMICAL NAME: 2-[4-methoxy-6-methyl-1, 3,5-triazin-2-yl (methyl) carbamoylsulfamoyl] benzoate Light brown,odourless solid. M.p. 141? V.p. 5.2×10 -5 mPa(25?) K owlogP=-0.44(PH 7) S.g./density 1.5(25?). Solubility In water 0.05(PH 5);2.04(PH 7)(both in g/L 20?).In acetone 43.8,acetonitrile 54.2,carbon tetrachloride 3.12,ethyl acetate 17.5,hexane 0.028,and methanol 3.39(all in g/L,25?). Stability On hydrolysis (45?),stable at PH 8-10 but rapid loss at PH<7 or PH>12.Relatively unstable in most organic solvents. TOXICOLOGY: Oral Acute oral LD 50 for rats > 5000mg/kg. Skin and eye Acute percutaneous LD 50 for rabbits >2000mg/kg.Non-irritating to skin (rabbits); mild (reversible) irritant to eyes. Mildly sensitising to skin. (guinea pig maximization test). Inhalation LC 50 (4h) for rats >5.0mg/L air. NOEL (2 y) for rats 25 ppm diet;(18 mo) for mice 200 ppm diet.Non-teratogenic in rats at 20 mg/kg daily. ADI 0.011 mg/kg. Birds Acute oral LD 50 for bobwhite quail>2250 mg/kg .Eight-day dietary LC 50 for bobwhite quail and mallard ducks>5620mg/kg. Fish LC 50 (96 h)for bluegill sunfish and rainbow trout>1000mg/L. Bees LD 50 for honeybees>100ug/bee. Worms LD 50 for earthworms>2000ppm. Daphnia LC 50 (48 h)720mg/L(unfed);1000mg/L(fed). SPECIFICATION AND FORMULATION: 95TC,75WG,10WP PACKING:25KG carton drum,or on the client's requirement. APPLICATION: Branched chain amino acid synthesis (acetolactate synthase or ALS) inhibitor.Acts by inhibiting bilsynthesis of the essential amino acids valine and isoleucine,hence stopping cell division and plant groth.Rapidly absorbed by foliage and roots and translocated throughout the plant.Susceptible plants cease grough almost immediately after post-emergence treatment and are killed in 7-21 days.Surfactants increase the activity of tribenuron-methyl on certain broad-leaved weeds.Post emergence control of broad-leaved weeds in spring and winter cereals,at 9-30g/ha.