N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-3-(trifluoromethyl)-2-pyridinesulfonamide

1-(4,6-dimethoxypyrimidin-2-yl)-3-(3-trifluoromethyl-2-pyridylsulfonyl)urea

C₁₃H₁₂F₃N₅O₅S

Form Odourless, white crystalline powder.

Melting point 180℃. Density 1.606 (20℃).

Solubility In water 2.1 g/l (pH 7, 25℃). In octanol 0.2, methanol 4.2, acetone 22.7, toluene 0.56, acetonitrile 8.7 (all in g/l, 25℃); in hexane 0.5 mg/l (25℃).

Oral Acute oral LD50 for rats and mice >5000 mg/kg.

Skin and eye Acute percutaneous LD50 for rats >2000 mg/kg. Not irritating to eyes or skin (rabbits). Non-sensitising to skin (guinea pigs).

Inhalation LC50 (4 h) for rats 5.99 mg/l.

Pre- and post- emergence control of grass and broad-leaved weeds and sedges (especially Cyperus brevifolius and Cyperus rotundus) in warm-season turf (Zoysia and Cynodon spp.). Also used in vines and sugar cane.