2349. Clethodim

Nomenclature

CAS number: 99129-21-2
2-[1-[[(3-Chloro-2-propenyl)oxy]imino]propyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one; (±)-2-[(E)-1-[(E)-3-chloroallyloxyimino]propyl]-5-[2-(ethylthio)propyl]-3-hydroxycyclohex-2-enone; RE-45601; Prism (Valent); Select (Valent).
C17H26ClNO3S; mol wt 359.91.
C 56.73%, H 7.28%, Cl 9.85%, N 3.89%, O 13.34%, S 8.91%.

Description and references

Systemic graminicide. Prepn: T. Luo, BE 897413; idem, US 4440566 (1983, 1984 both to Chevron). Properties and biological profile: R. T. Kincade et al., Proc. Br. Crop Prot. Conf. - Weeds 1987, 49. Degradation studies: L. N. Falb et al., J. Agric. Food Chem. 38, 875 (1990). Persistence in soil and efficacy against grasses: A. Rahman et al., Proc. 41st N. Z. Weed Pest Control Conf. 1988, 39. Field trial against grasses: J. H. Hunter, Weed Technol. 9, 432 (1995).

Chemical structure

Properties

Clear amber liquid. Sol in most organic solvents. LD50 in male, female rats (mg/kg): 1630, 1360 orally; LC50 in trout: 56 mg/l; 8 day feeding in quail: > 6000 ppm (Kincade).

Use

Post-emergent herbicide.