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Chemical Identification
Common Name
Oxadixyl
中文通用名
噁霜灵
IUPAC
2-methoxy-N-(2-oxo-1,3-oxazolidin-3-yl)aceto-2',6'-xylidide
CAS
N-(2,6-dimethylphenyl)-2-methoxy-N-(2-oxo-3-oxazolidinyl)acetamide
CAS No.
77732-09-3
Molecular Formula
C14H18N2O4
Molecular Structure
Category
Activity
Fungicide
Premix
Oxadixyl+mancozeb
Premix Parters: alachlor; glyphosate; isoxaben trifluralin; oryzalin; pendimethalin; simazine;
Physical Properties
Molecular weight:278.3g/mol; Physical form:Colourless, odourless crystals. Density:Bulk density 0.5 kg/l; Melting point:104-105 ℃; Vapour pressure:0.0033 mPa (20 ℃); Henry constant:2.70 × 10-7 Pa m3 mol-1 (calc.); Partition coefficient(n-octanol and water):logP = 0.65-0.8 (22-24 ℃); Solubility:In water 3.4 g/ kg (25℃). In acetone 344, dimethyl sulfoxide 390, methanol 112, ethanol 50, xylene 17, diethyl ether 6 (all in g/ kg, 25 ℃).; Stability:Stable under normal conditions, and when stored at 70 ℃ for 2-4 weeks. A 20 ppm solution of the a.i. is stable in aqueous buffer solutions of pH 5, 7 and 9 at room temperature.
Toxicology
Oral:Acute oral LD50 for male rats 3480, female rats 1860 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats and rabbits >2000 mg/kg. Non-irritating to skin and eyes (rabbits), nor a skin sensitiser to guinea pigs. Inhalation: LC50 (6 h) for male and female rats >5.6 mg/l air.
Environmental Profile
Ecotoxicology:
Algae: IC50 for Scenedesmus subspicatus 46 mg/l.Bees:LD50 (oral) >200 mg/bee; (contact) >100μg/bee.Birds:Acute oral LD50 for mallard ducks >2510 mg/kg. Dietary LC50 (8 d) for mallard ducks and Japanese quail >5620 mg/kg.Daphnia: LC50 (48 h) 530 mg/l.Fish: LC50 (96 h) for carp >300, rainbow trout >320, bluegill sunfish 360 mg/l. Does not bioaccumulate in fish.Worms:LD50 (14 d) for earthworms >1000 ppm ( mg a.i./kg dry soil).

Environmental fate:
Animals:In rats, following oral administration, absorption is rapid and almost complete, with 81-92% eliminated within 144 hours, in the urine and faeces. Extensive metabolism occurs, mainly by hydrolysis at various points on the methoxyacetamide moiety, and oxidSoil:In laboratory experiments, DT50 was 6-9 mo. However, in the field, DT50 values of 2-3 mo were observed. In soil, the main metabolite is oxadixyl acid.Plant:In plants, the major part (>94%) of the applied dosage remains unchanged. A maximum of 9% penetrates the leaf surface after 42 days, and c. 42% of this is metabolised. WATER SOLUBILITY: 3400 ppm at 20
Transport Information
Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)

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