Common name: Rimsulfuron

Chemical name: 1-(4,6-dimethoxypyrimidin-2-yl)-3-(3-ethylsulfonyl-2-pyridylsulfonyl)urea N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-3-(ethylsulfonyl)-2-pyridinesulfonamide Trade name ： 'Rush' (DuPont); 'Aducksbackside' (Me2) mixtures: 'Accent Gold' (+ clopyralid+ flumetsulam+ nicosulfuron) (DuPont); 'Basis Gold' (+atrazine+ nicosulfuron) (DuPont); 'Basis' (+thifensulfuron-methyl) (DuPont); 'Grid' (+ thifensulfuron-methyl) (DuPont); 'Pilar' (+metribuzin) (DuPont); 'Steadfast' (+ nicosulfuron) (DuPont); 'Titer' (+ terbuthylazine) (DuPont); 'Ultim' (+nicosulfuron) (DuPont); 'Wonder' (+terbuthylazine) (DuPont) Discontinued products: 'Shadeout' * (DuPont)

Molecular formula: C14H17N5O7S

Chemical structure:

Physical and Chemical Properties:

Molecular weight:431.4g/mol; Physical form: Colourless crystals. Density:0.784 (25℃); Composition: Tech. is 99%. Melting point:176-178℃; Vapour pressure:1.5 ×SYM> 10-3 mPa (25℃); Partition coefficient(n-octanol and water): logP = 0.288 (pH 5), -1.47 ( pH 7) (25℃); pKa:4.0; Solubility: In water (25℃) <10 mg/l (unbuffered); 7.3 g/l (buffered, pH 7).; Stability: On hydrolysis (25℃),DT50 4.6 d (pH 5), 7.2 d (pH 7), 0.3 d ( pH 9).

Purity: 95%

Uses: maize, potatoes, tomatoes

Mode of actions: 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.

Toxicology:

Oral: Acute oral LD₅₀ for rats >5000 mg/kg. Percutaneous: 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. ADI:(EPA)

0.125 mg/kg.

Environmental profile:

Ecotoxicology:

Bees:LD₅₀ (contact) >100 mg/bee; (dietary) >1000 ppm. Fish: (96 h) LC₅₀ >1000 mg/l

(bluegill, rainbow trout). Birds: Acute oral LD₅₀ for bobwhite quail >2250, mallard ducks >2000 mg/kg. Dietary LC₅₀ for bobwhite quail and mallard ducks >5620 ppm.

Daphnia: LC₅₀ (48 h) >360 mg/l.Fish:LC₅₀ (96 h) for bluegill sunfish and rainbow

trout >390, carp >900, sheepshead minnow 110 mg/l.Worms:LC₅₀ (14 d) for earthworms (Eisenia foetida) >1000 mg/kg.

Environmental fate:

Animals: Rapidly metabolised and excreted in the urine and faeces. Soil:Degraded rapidly in soil, predominantly via chemical pathways (microbial degradation plays a minor role). Major metabolite is [1-(3-ethylsulfonyl)-2-pyridinyl]-4,6-dimethoxy-2-pyrimidineamine. Rates of degradation are influenced by pH, anPlant:Half-life in maize 6 h, blackgrass 46 h, Johnsongrass 25 d and Sorghum bicolor 52 d. See also Biochemistry.

Transportation information:

Signal Word: CAUTION; Hazard Class: III (Slightly hazardous)

Other products:

Straight Formulated Products:

Rimsulfuron 12% OD

Rimsulfuron 25% WDG

Mixtures:

Nicosulfuron+atrazine+rimsulfuron Nicosulfuron+rimsulfuron Thifensulfuron-methyl+rimsulfuron

Rimsulfuron+chlorimuron-ethyl+mesotrione Rimsulfuron+metribuzin Rimsulfuron+Haloxyfop-P-methyl

Dry flowable. Premix Partners: acifluorfen bentazone.