Title: Butachlor
CAS Registry Number: 23184-66-9
CAS Name: N-(Butoxymethyl)-2-chloro-N-(2,6-diethylphenyl)acetamide
Additional Names: N-(butoxymethyl)-2-chloro-2¢,6¢-diethylacetanilide; 2-chloro-2,6-diethyl-N-(butoxymethyl)acetanilide
Manufacturers' Codes: CP-53619
Trademarks: Machete (Monsanto); Butanex (Makhteshim-Agan)
Molecular Formula: C17H26ClNO2
Molecular Weight: 311.85
Percent Composition: C 65.47%, H 8.40%, Cl 11.37%, N 4.49%, O 10.26%
Literature References: Selective pre-emergent and pre-plant herbicide. Prepn: J. F. Olin, US 3442945 (1969 to Monsanto). Toxicity data: A. Strateva, Exp. Med. Morphol. 13, 123 (1974). Degradation: Y.-L. Chen, T.-C. Wu, J. Pestic. Sci. 3, 411 (1978). Environmental persistence: T. Ohyama et al., Bull. Environ. Contam. Toxicol. 39, 555 (1987); and soil absorption: H.-C. Chiang et al., ibid. 58, 758 (1997). HPLC determn in soil: X. Weibing, J. Environ. Sci. (China) 8, 504 (1996). Control of barnyardgrass: T. C. Miller et al., MAFES Res. Highlights 46, 4 (1983); in rice: B. S. Azad et al., Seed Farms 15, 29 (1989).
Properties: Light yellow oil, bp0.5 196°. d430 1.0695. Soly in water at 20°: 20 mg/l. Sol in most organic solvents. LD50 orally in rats: 1740 mg/kg (Strateva).
Boiling point: bp0.5 196°
Density: d430 1.0695
Toxicity data: LD50 orally in rats: 1740 mg/kg (Strateva)
Use: Herbicide.
Butalbital Butallylonal Butamben Butamirate Butamisole

Butachlor structure.svg
CAS number 23184-66-9 YesY
PubChem 31677
ChemSpider 29376
EC number 245-477-8
KEGG C10931
Jmol-3D images Image 1
Molecular formula C17H26ClNO2
Molar mass 311.85 g mol−1
Appearance Light yellow oil
Density 1.0695 g/cm3
Solubility in water 20 mg/L (20 °C)
R-phrases R22 R50/53
S-phrases S60 S61
Flash point 100 °C[2]
LD50 1740 mg/kg (oral, rat)[1]
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Butachlor is an herbicide of the acetanilide class.[3] It is used as a selective pre-emergent herbicide.[1]