Pretilachlor
Title: Pretilachlor
CAS Registry Number: 51218-49-6
CAS Name: 2-Chloro-N-(2,6-diethylphenyl)-N-(2-propoxyethyl)acetamide
Additional Names: N-propoxyethyl-N-chloroacetyl-2,6-diethylaniline; 2,6-diethyl-N-(2¢-n-propoxyethyl)chloroacetanilide
Manufacturers' Codes: CGA-26423; CG-113
Trademarks: Rifit (Syngenta)
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 herbicide for control of perennial weeds in transplanted rice. Prepn, herbicidal properties: NL 7307584; C. Vogel, R. Aebi, US 4168965 (1973, 1979 both to Ciba-Geigy). Residue analysis, stability: H. Egli, J. Agric. Food Chem. 30, 861 (1982). Effect on leaf elongation in rice, use in combination with a safening agent (CGA 123,407): R. A. Christ, Weed Res. 25, 193 (1985). Brief account: J. Rufener, M. Quadranti, Proc. 10th Conf. Int. Congr. Plant Prot. 1, 332 (1983).
Properties: Colorless liquid, bp0.001 135°. Vapor pressure at 20°: 1´10-6 mm Hg. Almost insol in water (50 mg/l at 20°). Sol in most organic solvents. nD20 1.5204. LD50 in rats (mg/kg): 6099 orally; >3100 dermally (Rufener, Quadranti). LC50 in rainbow trout, carp, catfish: 3.0, 3.0, 2.6 ppm (Vogel, Aebi).
Boiling point: bp0.001 135°
Index of refraction: nD20 1.5204
Toxicity data: LD50 in rats (mg/kg): 6099 orally; >3100 dermally (Rufener, Quadranti); LC50 in rainbow trout, carp, catfish: 3.0, 3.0, 2.6 ppm (Vogel, Aebi)
Use: Herbicide for use in rice paddys.

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