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Chemical Identification
Common Name
Flupyrsulfuron-methyl-sodium
中文通用名
氟啶嘧磺隆
IUPAC
sodium (4,6-dimethoxypyrimidin-2-yl)[({[3-(methoxycarbonyl)-6-(trifluoromethyl)pyridin-2-yl]sulfonyl}amino)carbonyl]azanide
CAS
sodium salt of methyl 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-6-(trifluoromethyl)-3-pyridinecarboxylate
CAS No.
144740-54-5
Molecular Formula
C15H13F3N5NaO7S
Molecular Structure
Physical Properties
Molecular weight:487.3; Physical form:White powder, with a pungent odour. Density:1.48; Melting point:165-170 °C; Vapour pressure:1 × 10-6 mPa (20 °C); Partition coefficient(n-octanol and water):logP = 0.96 ( pH 5), 0.10 ( pH 6) (both 20 °C); pKa:4.9; Solubility:In water 63 mg/l ( pH 5, 25 °C). In dichloromethane 600, acetone 3094, ethyl acetate 490, acetonitrile 4332, n-hexane >1.0 (all in mg/l, 20 °C).; Stability: DT50 44 d ( pH 5), 12 d ( pH 7), 0.4 d ( pH 9) (20 °C). Stable in most organic solvents.
Toxicology
Oral:Acute oral LD50 for rats and mice >5000 mg/ kg. Percutaneous:Acute percutaneous LD50 for rabbits >2000 mg/kg. Not a skin or eye irritant (rabbits); not a skin sensitiser (guinea pigs). Inhalation: LC50 (4 h) for rats >5.8 mg/l.
Environmental Profile
Ecotoxicology: 
Algae: EC50 (5 d) for green algae >20 μg/l (growth rate), 13 μg/l (cell density).Bees: LD50 (contact) >25 μg/bee; (dietary) >30 μg/bee.Birds:Oral LD50 for mallard ducks >2250 mg/kg. Dietary LC50 for bobwhite quail and mallard ducks >5620 ppm.Daphnia: LC50 (48 h) 721 mg/l.Fish: LC50 (96 h) for carp 820, rainbow trout 470 mg/l.Other aquatic spp.: EC50 (14 d) for Lemna gibba, frond 5.0 μg/l, biomass 2.5 μg/l. 

Environmental fate: 
Low Kow suggests that bioaccumulation should not occur.Soil:In soil, DT50 8 - 25 d (20 °C), 58 d (10 °C) (lab. studies); field dissipation DT50 6-11 d, forming non-herbicidal materials. The primary degradation route involves rearrangem
Transport Information
Hazard Class:III(Slightly hazardous)

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