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Chemical Identification
Common Name
Pretilachlor
中文通用名
丙草胺
IUPAC
2-chloro-2′,6′-diethyl-N-(2-propoxyethyl)acetanilide
CAS
2-chloro-N-(2,6-diethylphenyl)-N-(2-propoxyethyl)acetamide
CAS No.
51218-49-6
Molecular Formula
C17H26ClNO2
Molecular Structure
Category
Activity
Herbicide
Formulation
TC = TC
Premix
Pyrazosulfuron-ethyl+dimethametryn+esprocarb+pretilachlor
Pyrazosulfuron-ethyl+pretilachlor
Bensulfuron-methyl+pretilachlor+clomazone
Bensulfuron-methyl+pretilachlor
Pyribenzoxim+pretilachlor
Mesotrione+pretilachlor
Simetryn+Pretilachlor
Isoproturon+Halosulfuron+Pretilachlor
Pyrazosulfuron-ethyl+Clomazone+Pretilachlor
Pyrazosulfuron-ethyl+Pyriminobac-methyl+Pretilachlor
Pretilachlor+Oxyfluorfen+Oxadiargyl
Bensulfuron-methyl+Pretilachlor+Oxadiazon
Pyribenzoxim+Pretilachlor+Cyhalofop-butyl
Penoxsulam+Pretilachlor
Penoxsulam+Pretilachlor+Pyrazosulfuron-ethyl
Penoxsulam+Pretilachlor+Cyhalofop-butyl
Pretilachlor+Oxadiargyl+Clomazone
Oxadiargyl+Pretilachlor
Pretilachlor+Oxadiazon+Clomazone
Quinclorac+Pretilachlor+Pyrazosulfuron-ethyl
Cinosulfuron+Pretilachlor
carbendazim; carbendazim fenbuconazole; carboxin; cartap hydrochloride; chlorothalonil; cyproconazole; dimethomorph triphenyltin hydroxide; fenpropidin; fenpropidin fenpropimorph; fenpropimorph; folpet; iprobenfos; propiconazole; tebuconazole; tetraconazole; thiram;
Physical Properties
Molecular weight:311.9; Physical form:Colourless liquid. Density:1.076 (20 °C); Flash point:129 °C (EEC A9); Vapour pressure:0.133 mPa (20 °C); Henry constant:8.1× 10-4 Pa m3 mol-1; Partition coefficient(n-octanol and water):logP = 4.08 (shake flask); Solubility:In water 50 mg/l (20 °C). Very soluble in benzene, hexane, methanol and dichloromethane.; Stability:Relatively stable to hydrolysis; DT50 (calc.) (20 °C) >200 d (pH 1-9), 14 d (pH 13).
Toxicology
Oral:Acute oral LD50 for rats 6099 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats >3100 mg/kg. Moderate irritant to skin; non-irritant to eyes (rabbits). Inhalation: LC50 (4 h) for rats >2.8 mg/l air. Phytotoxicity:Applied alone, pretilachlor will cause injury to direct-seeded rice.
Environmental Profile
Ecotoxicology: 
Algae: EC50 for Selenastrum capricornutum 0.002 mg/l.Bees: LD50 (contact) 93µg/bee.Birds:Non-toxic to birds; LD50 for Japanese quail >10 000 mg/kg. LC50 for Japanese quail >1000 ppm.Daphnia: LC50 13 mg/l.Fish: LC50 (96 h) for rainbow trout 0.9, catfish 2.7, crucian carp 2.3 mg/l. 

Environmental fate: 
Animals:Substitution of the chlorine atom for glutathione to form a conjugate. Cleavage of the ether bond to yield an ethyl alcohol derivative. Both metabolites are susceptible to further degradation.Soil:Applied to paddy water, pretilachlor disappeared from the water by adsorption to the soil, where it is rapidly degraded under practical conditions, median DT50 (lab.) 30 d. Due to strong soil adsorption, unlikely to leach.Plant:Substitution of the chlorine atom to form a conjugate. Cleavage of the ether bond to yield an ethyl alcohol derivative. Hydrolytic and reductive removal of the chlorine atom. WATER SOLUBILITY: 50 mg/l at 20° C
Transport Information
Hazard Class:III(Slightly hazardous)

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