Metolachlor

Agent Name
Metolachlor
CAS Number
51218-45-2
Formula
C15-H22-Cl-N-O2
Major Category
Pesticides
Metolachlor formula graphical representation
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 #1
Biomedical References

Exposure Assessment

Vapor Pressure
3.14E-05 mm Hg
Explanatory Notes
VP from HSDB;
Reference Link #2
NFPA
will not burn

Adverse Effects

Skin Sensitizer
Yes
Methemoglobinemia
MetHgb is secondary toxic effect

Diseases, Processes, and Activities Linked to This Agent

Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: