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51218-45-2

51218-45-2 structure
51218-45-2 structure
  • Name: metolachlor [ANSI, WSSA]
  • Chemical Name: metolachlor
  • CAS Number: 51218-45-2
  • Molecular Formula: C15H22ClNO2
  • Molecular Weight: 283.794
  • Catalog: Chemical pesticide herbicide Amide herbicide
  • Create Date: 2018-03-26 08:00:00
  • Modify Date: 2025-08-21 18:41:12
  • Metolachlor is a pre-emergent selective, chloroacetanilide herbicide for the control of a variety of annual grass and broad leaf weeds in corn and other crops. Metolachlor is a chiral herbicide consisting of four stereoisomers[1][2].
Name metolachlor
Synonyms 2-Chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide
Cotoran multi
2-Chloro-6'-ethyl-N-(2-methoxy-1-methylethyl)acet-o-toluidide
2R C1 BNV1GY1&1O1
2-chloro-N-(6-ethyl-o-tolyl)-N-[(1RS)-2-methoxy-1-methylethyl]acetamide
Primagram
2-chloro-6’-ethyl-N-[(1RS)-2-methoxy-1-methylethyl]acet-o-toluidide
Metolachlor
Bicep
Primextra
EINECS 257-060-8
Acetamide, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)-
2-Chloro-N-(2-ethyl-6-methylphenyl)-N-(1-methoxypropan-2-yl)acetamide
2-Chloro-N-(2-ethyl-6-methylphenyl)-N-(-2-methoxy-1-methylethyl)acetamide
rac-2-chloro-N-(2-ethyl-6-methylphenyl)-N-[(2R)-1-methoxypropan-2-yl]acetamide
MFCD00055293
α-Chloro-2'-ethyl-6'-methyl-N-(1-methyl-2-methoxyethyl)acetanilide
2-Chloro-N-(2-ethyl-6-methylphenyl)-N-(1-methoxy-2-propanyl)acetamide
Description Metolachlor is a pre-emergent selective, chloroacetanilide herbicide for the control of a variety of annual grass and broad leaf weeds in corn and other crops. Metolachlor is a chiral herbicide consisting of four stereoisomers[1][2].
Related Catalog
References

[1]. Jingqian Xie, et al. Metolachlor Stereoisomers: Enantioseparation, Identification and Chiral Stability. J Chromatogr A. 2016 Sep 9;1463:42-8.

[2]. D M Stamper, et al. Biodegradation of the Acetanilide Herbicides Alachlor, Metolachlor, and Propachlor. Crit Rev Microbiol. 1998;24(1):1-22.
Density 1.1±0.1 g/cm3
Boiling Point 406.8±45.0 °C at 760 mmHg
Melting Point -62.1 °C
Molecular Formula C15H22ClNO2
Molecular Weight 283.794
Flash Point 199.8±28.7 °C
Exact Mass 283.133911
PSA 29.54000
LogP 3.00
Vapour Pressure 0.0±0.9 mmHg at 25°C
Index of Refraction 1.533

CHEMICAL IDENTIFICATION

RTECS NUMBER :
AN3430000
CHEMICAL NAME :
o-Acetotoluidide, 2-chloro-6'-ethyl-N-(2-methoxy-1-methylethyl)-
CAS REGISTRY NUMBER :
51218-45-2
LAST UPDATED :
199701
DATA ITEMS CITED :
23
MOLECULAR FORMULA :
C15-H22-Cl-N-O2
MOLECULAR WEIGHT :
283.83
WISWESSER LINE NOTATION :
2R C1 BNV1GY1&1O1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
Open irritation test
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rabbit
TYPE OF TEST :
Standard Draize test
ROUTE OF EXPOSURE :
Administration into the eye
SPECIES OBSERVED :
Rodent - rabbit
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
2200 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LC50 - Lethal concentration, 50 percent kill
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
>1750 mg/m3/4H
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
3170 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
620 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
>9 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Unreported
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
3170 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
1150 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
410 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
2400 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
>10 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Bird - duck
DOSE/DURATION :
>2510 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
5460 mg/kg/13W-C
TOXIC EFFECTS :
Liver - changes in liver weight Nutritional and Gross Metabolic - weight loss or decreased weight gain
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
131 gm/kg/2Y-C
TOXIC EFFECTS :
Liver - other changes Liver - changes in liver weight Nutritional and Gross Metabolic - weight loss or decreased weight gain
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
263 gm/kg/2Y-C
TOXIC EFFECTS :
Nutritional and Gross Metabolic - weight loss or decreased weight gain
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Mammal - dog
DOSE/DURATION :
4550 mg/kg/26W-C
TOXIC EFFECTS :
Behavioral - food intake (animal) Nutritional and Gross Metabolic - weight loss or decreased weight gain Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - phosphatases
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
10 gm/kg
SEX/DURATION :
female 6-15 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death, e.g., stunted fetus) Reproductive - Specific Developmental Abnormalities - musculoskeletal system

MUTATION DATA

TYPE OF TEST :
Cytogenetic analysis
TEST SYSTEM :
Human Lymphocyte
DOSE/DURATION :
100 ug/L
REFERENCE :
MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 281,295,1992 *** U.S. STANDARDS AND REGULATIONS *** EPA FIFRA 1988 PESTICIDE SUBJECT TO REGISTRATION OR RE-REGISTRATION FEREAC Federal Register. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) V.1- 1936- Volume(issue)/page/year: 54,7740,1989
Symbol GHS07
GHS07
Signal Word Warning
Hazard Statements H317
Precautionary Statements P280
Personal Protective Equipment Eyeshields;Faceshields;Gloves
Hazard Codes Xi:Irritant
Risk Phrases R43
Safety Phrases S36/37
RIDADR UN1648 3/PG 2
RTECS AN3430000
HS Code 2924299017
51219-00-2 structure

51219-00-2

79-04-9 structure

79-04-9

~%

51218-45-2 structure

51218-45-2

Literature: Ciba-Geigy Corporation Patent: US4317916 A1, 1982 ;
24549-06-2 structure

24549-06-2

~%

51218-45-2 structure

51218-45-2

Literature: Ciba-Geigy Patent: CH581607 , 1976 ; Chem.Abstr., 1977 , vol. 86, # 72242
HS Code 2924299017
Summary 2924299017 2-chloro-n-(2-ethyl-6-methylphenyl)-n-(1-methoxypropan-2-yl)acetamide。supervision conditions:s(import or export registration certificate for pesticides)。VAT:17.0%。tax rebate rate:9.0%。MFN tarrif:6.5%。general tariff:30.0%
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