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Chemical Identification
Common Name
Benzofenap
中文通用名
吡草酮
IUPAC
2-[4-(2,4-dichloro-m-toluoyl)-1,3-dimethylpyrazol-5-yloxy]-4'-methylacetophenone
CAS
2-[[4-(2,4-dichloro-3-methylbenzoyl)-1,3-dimethyl-1H-pyrazol-5-yl]oxy]-1-(4-methylphenyl)ethanone
CAS No.
82692-44-2
Molecular Formula
C22H20Cl2N2O3
Molecular Structure
Category
Activity
Herbicide
Premix
Flowable, granule. Premix Parters: chlorotoluron; ioxynil mecoprop; ioxynil mecoprop-P; isoproturon; isoproturon mecoprop; isoproturon mecoprop neburon; isoproturon mecoprop-P; mecoprop-P; pyraflufen-ethyl;
Physical Properties
Molecular weight:431.3; Physical form:White solid. Melting point:133.1-133.5 °C; Vapour pressure:0.013 (30 °C); Partition coefficient(n-octanol and water):logP = 4.69; Solubility:In water 0.13 /l (25 °C). In xylene 69, acetone 73, n-hexane 5.6, chloroform 920 (all in g/l, 20 °C).;
Toxicology
Oral:Acute oral 50 for rats and mice >15 000 /. Percutaneous:Acute percutaneous 50 for rats >5000 /. Inhalation:50 (4 h) for rats >1.93 /l. Phytotoxicity:Non-phytotoxic to rice plants. ADI:0.0015 /.
Environmental Profile
Ecotoxicology: 
Daphnia:50 (3 h) >10 /l.Fish:50 (48 h) for rainbow trout, carp, and loach >10 /l. 

Environmental fate: 
Soil:50 in paddy field soil 38 d. Movement of benzofenap in soil is only very slightly affected by soil type, the maximum movement being to 1 cm below the surface.Plant:No detectable residues in rice crops (detection limit 0.005 ).
Transport Information
Signal Word:CAUTION; 
Hazard Class:III(Slightly hazardous)

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