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

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

C₁₄H₁₇N₅O₇S₂

Form Colourless crystals.

Melting point 172-173℃. Density 0.784 (25℃).

Solubility In water (25℃) <10 mg/l (unbuffered); 7.3 g/l (buffered, pH 7).

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

Skin and eye Acute percutaneous LD50 for rabbits >2000 mg/kg.

Non-irritating to skin; moderately irritating to eyes (rabbits).

Non-sensitising to skin (guinea pigs).

Inhalation LC50 (4 h) for rats >5.4 mg/l air.

Rimsulfuron is a post-emergence sulfonylurea herbicide that effectively controls most annual and perennial grasses and several broad-leaved weeds in maize. Also used in tomatoes and potatoes.