Chemical Identification
Common Name
Mepronil
中文通用名
灭锈胺
IUPAC
3'-isopropoxy-o-toluanilide
CAS
2-methyl-N-[3-(1-methylethoxy)phenyl]benzamide
CAS No.
[55814-41-0]
Molecular Formula
C17H19NO2
Molecular Structure
Physical Properties
Molecular weight:269.3; Physical form:Colourless crystals. Composition:Tech. is >94%. Melting point:92-93 °C; Flash point:225 °C; Vapour pressure:0.056 (20 °C); Henry constant:1.19 × 10-3 Pa m3 mol-1 ; Partition coefficient(n-octanol and water):logP = 3.66; Solubility:In water 12.7 /l (20 °C). In acetone >500, methanol >500, acetonitrile 314, benzene 282, hexane 1.1 (all in g/l, 20 °C).; Stability:Stable to light, air, and heat. Stable in neutral, acidic, and weakly alkaline conditions, but hydrolysed in highly alkaline conditions.;
Toxicology
Oral:Acute oral 50 for rats and mice >10 000 /. Percutaneous:Acute percutaneous 50 for rabbits and rats >10 000 /kg. Non-irritating to skin and eyes (rabbits). Inhalation:50 (6 h) for rats >1.32 /l.
Environmental Profile
Ecotoxicology: 
Bees:Acute 50 (oral) >0.1 /bee; (contact) >1 /bee.Birds:Acute oral 50 for hens >8000 /.Daphnia:50 for D. carinata >10 /l.Fish:50 (96 h) for carp 8, rainbow trout 10 /l. 

Environmental fate: 
Animals:Almost all of the dose applied to rats was excreted in urine and faeces within 96 h.Soil:50 in flooded soil 46 d (volcanic sandy loam, 6.8, 1.47%), 50.5 d (alluvial, 6.5, 1.18%).Plant:Almost all 14C applied to rice leaf sheath or leaf remained in the part treated, with some translocation upwards. Five metabolites were identified.WATER SOLUBILITY:12.7 ppm at 20°C
Transport Information
Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)

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