Azafenidin

Title: Azafenidin
CAS Registry Number: 68049-83-2
CAS Name: 2-[2,4-Dichloro-5-(2-propynyloxy)phenyl]-5,6,7,8-tetrahydro-1,2,4-triazolo[4,3-a]pyridin-3(2H)-one
Manufacturers' Codes: DPX-R6447
Trademarks: Milestone (DuPont); Evolus (DuPont)
Molecular Formula: C15H13Cl2N3O2
Molecular Weight: 338.19
Percent Composition: C 53.27%, H 3.87%, Cl 20.97%, N 12.42%, O 9.46%
Literature References: Porphyrin biosynthesis inhibitor. Prepn: A. D. Wolf, BE 862884; idem, US 4213773 (1978, 1980 both to Du Pont). Review of physical properties, mode of action, and activity: K. Amuti et al., Brighton Crop Prot. Conf. - Weeds 1997, 59-66.
Properties: White powdered solid, mp 168-168.5°. Vapor pressure at 20°: 1.0 ´ 10-11 torr. Partition coefficient (octanol/water): 229. LD50 in rats, mice, bobwhite quail, mallard duck (mg/kg): >5000, >5000, >2500, >2500 orally; in rabbits (mg/kg): >2000 dermally. LC50 in rats, rainbow trout, blue gill sunfish (mg/l): >5.3, 33, 48 (Amuti).
Melting point: mp 168-168.5°
Log P: Partition coefficient (octanol/water): 229
Toxicity data: LD50 in rats, mice, bobwhite quail, mallard duck (mg/kg): >5000, >5000, >2500, >2500 orally; in rabbits (mg/kg): >2000 dermally.; LC50 in rats, rainbow trout, blue gill sunfish (mg/l): >5.3, 33, 48 (Amuti)
Use: Herbicide.
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