nav Searchuser
Chemical Identification
Common Name
Methomyl
中文通用名
灭多威
IUPAC
S-methyl N-(methylcarbamoyloxy)thioacetimidate
CAS
methyl N-[[(methylamino)carbonyl]oxy]ethanimidothioate
CAS No.
[16752-77-5]
Molecular Formula
C5H10N2O2S
Molecular Structure
Category
Activity
Insecticide, acaricide
Premix
Imidacloprid+methomyl
Endosulfan+methomyl
Lambda-cyhalothrin+methomyl
Lambda-cyhalothrin+methomyl+phoxim
Pyridaphenthion+methomyl+fenvalerate
Malathion+methomyl+fenvalerate
Methomyl+fenvalerate
Methomyl+fenvalerate+phoxim
Fenpropathrin+methomyl+phoxim
Beta-cypermethrin+methomyl
Beta-cypermethrin+methomyl+phoxim
Methomyl+phoxim
Methomyl+methamidophos
Liquid, low volatility liquid, water-soluble powder. 
Premix Parters: endosulfan; parathion; phosalone;
Physical Properties
Molecular weight:162.2; Physical form:Colourless crystals, with a slight sulfurous odour. Density:1.2946 (25 °C); Composition:Methomyl is a mixture of (Z)- and (E)- isomers, the former predominating. Melting point:78-79 °C; Vapour pressure:0.72 (25 °C); Henry constant:2.13 × 10-6 Pa m3 mol-1; Partition coefficient(n-octanol and water):logP = 0.093; Solubility:In water 57.9 g/l (25 °C). In methanol 1000, acetone 730, ethanol 420, isopropanol 220, toluene 30 (all in g/, 25 °C). Sparingly soluble in hydrocarbons.; Stability:Stable in water for 30 d ( 5 and 7); 50 c. 30 d ( 9). Stable up to 140 °C. Stable to sunlight when exposed for 120 d.;
Toxicology
Oral:Acute oral 50 for male rats 34, female rats 30 /. Percutaneous:Acute percutaneous 50 for male and female rabbits >2000 /kg. Mild eye irritant (rabbits). Not a skin irritant (guinea pigs). Inhalation:50 (4 h) for rats 0.3 /l air (aerosol). Phytotoxicity:Non-phytotoxic when used as recommended, except to some vari
Environmental Profile
Ecotoxicology: 
Algae:50 (72 h) 60 /l.Bees:Toxic to bees, contact 50 0.1 mg/bee, but not hazardous when the spray has dried.Birds:Acute oral 50 for mallard ducks 15.9, pheasants 15.4 /kg. Dietary 50 (8 d) for Pekin ducks 1890, bobwhite quail 3680 / diet.Daphnia:50 (48 h) 31.7 mg/l.Fish:50 (96 h) for rainbow trout 3.4, bluegill sunfish 0.9 /l.Worms:50 (14 d) 23 / dry soil. 

Environmental fate: 
Animals:In rats, methomyl was rapidly converted to methomyl methylol, oxime, sulfoxide and sulfoxide oxime; these unstable intermediates were converted to acetonitrile and CO2, which were eliminated primarily via respiration and in the urine. MetabolisSoil:Rapidly degraded in soil. 50 in groundwater samples <0.2 d (J. H. Smelt, Pestic. Sci., 1983, 14, 173-181). oc 72.Plant:50 following leaf application c. 3-5 d. Rapidly degraded to CO2 and acetonitrile, with incorporation into natural plant components (J. Harvey & R. W. Reiser, Agric. Food Chem., 1973, 21
Transport Information
Signal Word:DANGER; Hazard Class:Ib(Highly hazardous)

Porduct NewsMore

Adama got use extension for Voraz insecticide in Brazil

Methomyl Novaluron

Canada to cancel food and feed uses of insecticide methomyl

Methomyl

US EPA to cancel methomyl uses in some crops

Methomyl

Related CompaniesMore

Yancheng Limin Chemical Co.,Ltd

Country:  China

Triadimefon Triadimenol Hexaconazole Flutriafol Imidacloprid Paclobutrazol Tebuconazole Thifluzamide Indoxacarb Uniconazole

Anhui Huaxing Chemical Industry Co., Ltd.

Country:  China

Kresoxim-methyl Cartap Glyphosate Imidacloprid Nicosulfuron MCPA-2-ethylhexyl Flusilazole Thiosultap-monosodium MCPA Fipronil

Shandong Weifang Rainbow Chemical Co., Ltd.

Country:  China

Glufosinate-ammonium 2,4-D MCPA Dicamba Propanil Clethodim Glyphosate Captan Flumioxazin Sulfentrazone

IPROCHEM CO.,LTD.

Country:  China

Emamectin benzoate Imidacloprid Azoxystrobin Glyphosate Chlorothalonil Etoxazole Dinotefuran Carbofuran Glufosinate-ammonium Methomyl

ANHUI RUIFENG AGROCHEMICAL CO., LTD.

Country:  China

Diazinon Emamectin benzoate Lambda-cyhalothrin Methomyl Thiamethoxam Chlorothalonil Paclobutrazol GLYPHOSATE(AMMONIUM) 75%+MCPA(NA)5% SG TERBUCONAZOLE 133G/L+PICHLORAZ 267G/L EW Aluminium phosphide