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Chemical Identification
Common Name
Cinosulfuron
中文通用名
醚磺隆
IUPAC
1-(4,6-dimethoxy-1,3,5-triazin-2-yl)-3-[2-(2-methoxyethoxy)phenylsulfonyl]urea
CAS
N-[[(4,6-dimethoxy-1,3,5-triazin-2-yl)amino]carbonyl]-2-(2-methoxyethoxy)benzenesulfonamide
CAS No.
94593-91-6
Molecular Formula
C15H19N5O7S
Molecular Structure
Category
Activity
Herbicide
Premix
Cinosulfuron+Pretilachlor
Granules, water dispersible granules. Premix Parters: cloquintocet-mexyl; trifluralin.
Physical Properties
Molecular weight:413.4; Physical form:Colourless crystalline powder. Density:1.47 (20 °C). Melting point:127.0-135.2 °C (pure); Vapour pressure:<0.01 mPa (25 °C) (OECD 104); Henry constant:<1×10-6 Pa m3 mol-1 (pH 6.7, calc.); Partition coefficient(n-octanol and water):logP = 2.04 (pH 2.1, 25 °C); pKa:4.72; Solubility:In water 120 (pH 5.0), 4000 (pH 6.7), 19 000 (pH 8.1) (all in mg/l, 25 °C). In acetone 36 000, ethanol 1900, toluene 540, n-octanol 260, n-hexane <1 (all in mg; Stability:Decomposes above the melting point. No significant hydrolysis at pH 7-10; considerable hydrolysis at pH 3-5.
Toxicology
Oral:Acute oral LD50 for rats and mice >5000 mg/kg. Percutaneous:Acute percutaneous LD50 for rats >2000 mg/kg; not irritant to skin or eyes of rabbits. Non-sensitising to skin (guinea pigs). Inhalation:LC50 (4 h) for rats >5 mg/l air. Phytotoxicity:No varietal restrictions for rice.
Environmental Profile
Ecotoxicology: Algae:EC50 (72 h) for Scenedesmus subspicatus 4.8 mg/l.Bees:Non-toxic; LD50 (oral and contact) >100 μg/bee.Birds:Acute oral LD50 for Japanese quail >2000 mg/kg.Daphnia:LC50 (48 h) 2500 mg/l.Fish:LC50 (96 h) for rainbow trout >100 mg/l.Worms:LC50 (14 d) for Eisenia foetida 1000 mg/kg. Environmental fate: Animals:Hydrolysis of methoxy groups and cleavage of the sulfonylurea bridge. It is rapidly excreted (80-100% within 24 h).Soil:In soil, degrades a) by O-dealkylation in both ring systems, forming the corresponding phenol, mono- and di- hydroxytriazine and b) by cleavage of the sulfonylurea bridge; degradation proceeds further to form bound residues and CO2.  WATER SOLUBILITY: 25°C: 120 mg/l (pH 5), 4000 mg/l (pH 6.7)
Transport Information
Signal Word:CAUTION; Hazard Class:III (Slightly hazardous)

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