Chemical Identification
Common Name
Metolachlor
中文通用名
异丙甲草胺
IUPAC
2-chloro-N-(6-ethyl-o-tolyl)-N-[(1RS)-2-methoxy-1-methylethyl]acetamide
or
(aRS,1RS)-2-chloro-6′-ethyl-N-(2-methoxy-1-methylethyl)acet-o-toluidide
CAS
2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide
CAS No.
51218-45-2
Molecular Formula
C15H22ClNO2
Molecular Structure
Category
Activity
Herbicide
Premix
Bensulfuron-methyl+metolachlor
Atrazine+S-metolachlor
Sulfentrazone+S-metolachlor
Atrazine+mesotrione+S-metolachlor
Metolachlor+metribuzin
Metolachlor+fomesafen
Metolachlor+Atrazine
Atrazine Bicyclopyrone Mesotrione S-metolachlor
Oxyfluorfen+S-metolachlor
Emulsifiable concentrate, granules. 
Premix Parters: flufenacet;
Physical Properties
Molecular weight:283.8; Physical form:Colourless to light tan liquid. Density:1.12 (20 °C); Composition:Racemic mixture of (1S)- and (1R)- isomers. Melting point:-62.1 °C; Flash point:190 °C (1013 mbar); Vapour pressure:4.2 mPa (25 °C) (OECD 104); Henry constant:2.4 ×10-3 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 2.9 (25 °C); Solubility:In water 488 mg/l (25 °C) ( OECD 105). Miscible with benzene, toluene, ethanol, acetone, xylene, hexane, dimethylformamide, ethylene dichloride, cyclohexanone, methanol, octanol, and dichloromethane. Insoluble in ethylene ; Stability:Stable up to c. 275 °C. Hydrolysed by strong alkalis and strong mineral acids. On hydrolysis in buffer (20 °C), DT50 ( calc.) >200 d (pH >10).;
Toxicology
Oral:Acute oral LD50 for rats 2780 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats >3170 mg/kg. Mild skin and eye irritant (rabbits). May cause skin sensitisation (guinea pigs). Inhalation: LC50 (4 h) for rats >1.75 mg/l air. Phytotoxicity:Well tolerated by most broad-leaved crops, maize, sorghum (safened with fluxofenim or oxabetrinil). ADI:0.008 mg/ kg b.w.
Environmental Profile
Ecotoxicology: 
Algae:EC50 for Scenedesmus subspicatus 0.1 mg/l.Bees: LD50 (oral and contact) >110 mg/bee.Birds:Acute oral LD50 for mallard ducks and bobwhite quail >2150 mg/kg. Dietary LC50 (8 d) for bobwhite quail and mallard ducks >10 000 mg/ kg.Daphnia:LC50 (48 h) 25 mg/l.Fish:LC50 (96 h) for rainbow trout 3.9, carp 4.9, bluegill sunfish 10 mg/l.Worms:LC50 (14 d) for earthworms 140 mg/ kg soil. 

Environmental fate: 
Animals:Rapidly oxidised by rat liver microsomal oxygenases via dechlorination, O-demethylation and side-chain oxidation (J. Agric. Food Chem., 1989, 37, 1088).Soil:Major aerobic metabolites are derivatives of oxanilic and sulfonic acids. DT50 in soil c. 20 d (field). Koc 121-309.Plant:In plants, metabolism involves natural product conjugation of the chloroacetyl group, and hydrolysis and sugar conjugation at the ether group. Final metabolites are polar, water-soluble, and non-volatile.
Transport Information
Hazard Class:III(Slightly hazardous)

Porduct NewsMore

EFSA evaluates necessity of bromoxynil use

Bromoxynil

Germany aims to end use of glyphosate in this legislative period

Glyphosate

CropLife America, Corteva issue statement on chlorpyrifos ban

Chlorpyrifos

Monsanto ordered to pay $289m damages in glyphosate cancer trial

Glyphosate

Federal court orders US EPA to remove chlorpyrifos from the market

Chlorpyrifos

Brazil agrochemical group to appeal ruling suspending glyphosate

Glyphosate

BASF presents Enervin line for the protection of the vineyards in Spain

Ametoctradin

France set to become new watchdog in safety assessment of glyphosate

Glyphosate

US EPA to register the first food and outdoor uses for Nichino’s insecticide pyrifluquinazon

Pyrifluquinazon

Brazil judge suspends use of glyphosate

Glyphosate

Related CompaniesMore

Hangzhou Qingfeng Imp.& Exp. Co.,Ltd.

Country:  China

S-metolachlor Fomesafen Flumioxazin Clethodim Imazapyr Tebuthiuron Azoxystrobin Tebuconazole Oxyfluorfen Metolachlor

Jiangsu Yongan Chemical Co., Ltd.

Country:  China

Pendimethalin Methoxyfenozide 2,4-D Clethodim Quinclorac Glufosinate-ammonium Metolachlor Atrazine Pendimethalin

Nutrichem Company Limited

Country:  China

Oxyfluorfen Tebuconazole Metolachlor Azoxystrobin Clopyralid Triclopyr Tebuthiuron Acifluorfen Clethodim Imazapyr Picloram Pretilachlor Bifenthrin Amitraz Mesotrione

Jingma Chemicals Co., Ltd.

Country:  China

Glyphosate 2,4-D Diuron Ametryn Trifluralin Nicosulfuron Thiamethoxam Atrazine+mesotrione Propanil+Clomazone Atrazine Propanil Dicamba

Shandong Weifang Rainbow Chemical Co., Ltd.

Country:  China

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