Title: Acetochlor
CAS Registry Number: 34256-82-1
CAS Name: 2-Chloro-N-(ethoxymethyl)-N-(2-ethyl-6-methylphenyl)acetamide
Additional Names: 2-chloro-N-(ethoxymethyl)-6¢-ethyl-o-acetotoluidide; 2¢-ethyl-6¢-methyl-N-(ethoxymethyl)-2-chloroacetanilide
Manufacturers' Codes: MON-097; MG-02
Trademarks: Harness (Monsanto); Surpass (Dow AgroSci.); TopNotch (Dow AgroSci.); Trophy (Dow AgroSci.)
Molecular Formula: C14H20ClNO2
Molecular Weight: 269.77
Percent Composition: C 62.33%, H 7.47%, Cl 13.14%, N 5.19%, O 11.86%
Literature References: Pre-emergent herbicide. Prepn: J. F. Olin, US 3547620 (1970 to Monsanto). Description of physical and biological properties: R. P. Upchurch et al., Proc. North Cent. Weed Control Conf. 25, 56 (1970). Synthesis: B. G. Zupancic, M. Sopcic, Synthesis 1982, 942. Field trials on peanuts and soybeans: C. W. Derting et al., Proc. South. Weed Sci. Soc. 25, 131 (1972); on peanuts: L. R. Hawf, K. R. Frost, Jr., ibid. 38, 20 (1985). Soil adsorption and bioactivity: J. B. Weber, C. J. Peter, Weed Sci. 30, 14 (1982). Soil transformation: P. C. C. Feng, Pestic. Biochem. Physiol. 40, 136 (1991).
Properties: Pale straw-colored oil. bp0.4 torr 134°. nD20 1.5272. Sol in water (25°): 400 ppm. LD50 orally in rats: 1160 mg/kg (Upchurch).
Boiling point: bp0.4 torr 134°
Index of refraction: nD20 1.5272
Toxicity data: LD50 orally in rats: 1160 mg/kg (Upchurch)
Use: Herbicide.
Acetohexamide Acetohydroxamic Acid Acetoin Acetomeroctol Acetone

CAS number 34256-82-1 YesY
PubChem 1988
ChemSpider 1911 YesY
KEGG C10925 YesY
Jmol-3D images Image 1
Molecular formula C14H20ClNO2
Molar mass 269.767 g/mol
Density 1.100 at 30 °C
1.136 at 20 °C
Melting point <0 °C
Solubility in water 223 ppm
Flash point >100 °C
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Acetochlor is a herbicide developed by Monsanto Company and Zeneca. It is a member of the class of herbicides known as chloroacetanilides. Its mode of action is elongase inhibition, and inhibition of geranylgeranyl pyrophosphate (GGPP) cyclisation enzymes, part of the gibberellin pathway. It carries high risks of environmental contamination.[2]