Chemical Identification
Common Name
Ethalfluralin
中文通用名
乙丁烯氟灵
IUPAC
N-ethyl-α,α,α-trifluoro-N-(2-methylallyl)-2,6-dinitro-p-toluidine
CAS
N-ethyl-N-(2-methyl-2-propenyl)-2,6-dinitro-4-(trifluoromethyl)benzenamine
CAS No.
55283-68-6
Molecular Formula
C13H14F3N3O4
Molecular Structure
Category
Activity
Herbicide
Premix
EC, 10G. 
Premix Parters: prothioconazole;
Physical Properties
Molecular weight:333.3; Physical form:Yellow-orange crystals, with a faint amine odour. Melting point:55-56 °C; Flash point:151 °C (Setaflash closed cup; ASTM D-3278); Vapour pressure:11.7 mPa (25 °C); Henry constant:1.30 × 101 Pa m3 mol-1 (25 °C, calc.); Partition coefficient(n-octanol and water):logP = 5.11 ( pH 7, 25 °C); Solubility:In water 0.3 mg/l ( pH 7, 25 °C). In acetone, acetonitrile, benzene, chloroform, dichloromethane, xylene >500, methanol 82-100 (all in g/l, 25 °C).; Stability:Tech. stable at 52 °C (highest storage temperature tested). No hydrolysis after 33 d at pH 3, 6 and 9 (51 °C). Photolysis DT50 (aqueous) 6.3 h; (vapour phase) 2 h.;
Toxicology
Oral:Acute oral LD50 for rats >5000 mg/ kg. Percutaneous:Acute percutaneous LD50 for rabbits >5000 mg/kg. Moderate to severe irritant to skin; moderate eye irritant (rabbits). Inhalation: LC50 (1 h) for rats >2.8 mg/l.
Environmental Profile
Ecotoxicology: Algae:
For Selenastrum capricornutum, NOEL 0.004 mg/l; EC50 specific growth rate 0.009 mg/l.Bees:Not toxic to bees. LD50 (contact) 51 mg/bee (by linear regression).Birds:Acute oral LD50 for bobwhite quail >2000 mg/kg. Dietary LC50(5 d) for bobwhite quail and mallard ducks >5000 mg/ kg diet.Daphnia: LC50 (48 h) >0.365 mg/l; NOEC (21 d) 0.068 mg/l.Fish: LC50 (96 h) for bluegill sunfish 0.102, rainbow trout 0.136 mg/l.Other aquatic spp.: EC50 (shell deposition) for eastern oyster (Crassostrea virginica) 0.172 mg/l. 

Environmental fate: 
Animals:In rats, following oral administration, 86% is excreted within 48 hours (64% in the faeces and 22% in the urine) and 95% within 7 days. In the urine, 3 metabolites have been identified, resulting from oxidation of the N-alkyl side-chain and/or bySoil:Ethalfluralin is strongly adsorbed on soil, with negligible leaching; half-life in soils 25-46 days. Photolytic and microbial degradation takes place (B. J. Hayden & A. E. Smith, Bull. Environ. Contam. Toxicol., 1983, 25, 508). APlant:The same pattern of metabolism is observed as for trifluralin.
Transport Information
Signal Word:WARNING; Hazard Class:II(Moderately hazardous)

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