Agent Name

Metolachlor

CAS Number

51218-45-2

Formula

C15-H22-Cl-N-O2

Major Category

Pesticides

Synonyms

2-Aethyl-6-methyl-N-(1-methyl-2-methoxyaethyl)-chloracetanilid [German]; 2-Chloro-6'-ethyl-N-(2-methoxy-1-methylethyl)-o-acetotoluidine; 2-Chloro-6'-ethyl-N-(2-methoxy-1-methylethyl)acet-o-toluidide; 2-Chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide; 2-Ethyl-6-methyl-1-N-(2-methoxy-1-methylethyl)chloroacetanilide; 2-Etylo-6-metylo-N-(1'-metylo-2'-metoksyetylo)chloroacetanilid [Polish]; Acetamide, 2-chloro-N-(6-ethyl-o-tolyl)-N-(2-methoxy-1-methylethyl)-; CGA-24705; Codal; Dual; Dual 720EC; Dual 8E; Dual 960 EC; Dual II; Dual Magnum; Dual Triple; Humextra; Metelilachlor; Metolachlor technical; Metolachlore [ISO-French]; N-(1-Methyl-2-methoxyethyl)-N-chloroacetyl-2-ethyl-6-methylaniline; N-(2'-Methoxy-1'-methylethyl)-2'-ethyl-6'-methyl-2-chloroacetanilide; Ontrack 8E; Pennant; Yibingjiacaoan; alpha-Chlor-6'-aethyl-N-(2-methoxy-1-methylaethyl)-acet-o-toluidin [German]; alpha-Chloro-2'-ethyl-6'-methyl-N-(1-methyl-2-methoxyethyl)-acetanilide; o-Acetotoluidide, 2-chloro-6'-ethyl-N-(2-methoxy-1-methylethyl)-; [ChemIDplus] Bicep; Pimagram; [EXTOXNET]

Category

Herbicides, Chloracetanilide

Description

Colorless liquid; [Merck Index] White to tan liquid; [HSDB]

Sources/Uses

Used to control weeds in crops of corn, soybeans, peanuts, sorghum, potatoes, peas, cotton, safflower, stone fruits, nut trees, and ornamentals; also used on roadways; [EXTOXNET] Used in corn, peanuts, and soybeans; [Krieger, p. 1762]

Comments

Classified as 'slightly toxic," metolachlor is an pre-emergent herbicide with an oral LD50 of 2780 mg/kg. [EXTOXNET] Methemoglobinemia has been reported after poisoning by ingestion. [HSDB] No listed effects of short-term or long-term exposure; [ICSC] A strong skin sensitizer; Increased incidence of liver tumors in female rats; No developmental toxicity; Reduced pup weights in reproductive study with no toxicity in parental animals; [Krieger, p. 1762-3]

Reference Link

EXTOXNET PIP - METOLACHLOR

Exposure Assessment
Vapor Pressure

1.3E-5 mm Hg

Reference Link

EPA Pesticide Chemical Search

Adverse Effects
Skin Sensitizer

Yes

Methemoglobinemia

Methemoglobinemia, Secondary

Links to Other NLM Databases
Health Studies

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Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: