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Chemical Identification
Common Name
Benoxacor
中文通用名
解草酮
IUPAC
(RS)-4-dichloroacetyl-3,4-dihydro-3-methyl-2H-1,4-benzoxazine
CAS
4-(dichloroacetyl)-3,4-dihydro-3-methyl-2H-1,4-benzoxazine
CAS No.
98730-04-2
Molecular Formula
C11H11Cl2NO2
Molecular Structure
Physical Properties
Molecular weight:260.1; Physical form:Colourless solid. Density:1.52 (20 °C); Melting point:107.6 °C; Flash point:185 °C (Pensky-Martens closed cup); Vapour pressure:0.59 (20 °C); Henry constant:7.67 ?/SYM> 10-3 Pa m3 mol-1 (); Partition coefficient(n-octanol and water):logP = 2.6; Solubility:In water 20 /l (20 °C). In acetone 230, cyclohexanone 300, methylene chloride 400, methanol 30, n-octanol 11, isopropanol 13, toluene 90, hexane 3.2, xylene 60 (all in g/).; Stability:Stable up to 200 °C. Stable in acidic media, hydrolyses in alkaline media; 50 c. 50 d ( 7). Undergoes rapid photolytic degradation (c. 0.5 h, 7, natural sunlight).;
Toxicology
Oral:Acute oral 50 for rats >5000 /. Percutaneous:Acute percutaneous 50 for rabbits >2010 /kg. Non-irritating to skin and eyes (rabbits). May cause skin sensitisation (guinea pigs). Inhalation:50 (4 h) for rats >2.0 /l air. ADI:0.005 / b.w.
Environmental Profile
Ecotoxicology:
 Algae:50 (72 h) for Scenedesmus subspicatus 0.63 /l.Bees:50 (48 h) (oral and contact) >100 mg/bee.Birds:Acute oral 50 for mallard ducks >2150, bobwhite quail 2000 /.Daphnia:50 (48 h) 4.8 /l.Fish:50 (96 h) for rainbow trout 2.4, carp 10, bluegill sunfish 6.5 /l.Worms:50 (14 d) for earthworms >1000 /

Environmental fate:
 Animals:Benoxacor is metabolised to water-soluble conjugation products following ring hydroxylation, deacetylation and reductive dechlorination.Soil:50 in soil c. 5 d. oc 42-176.Plant:Metabolites are the same as in animals.
Transport Information
Signal Word:CAUTION; 
Hazard Class:III(Slightly hazardous)

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