Title: Fentrazamide
CAS Registry Number: 158237-07-1
CAS Name: 4-(2-Chlorophenyl)-N-cyclohexyl-N-ethyl-4,5-dihydro-5-oxo-1H-tetrazole-1-carboxamide
Additional Names: 1-(2-chlorophenyl)-4-(N-cyclohexyl-N-ethylcarbamoyl)-5(4H)-tetrazolinone
Manufacturers' Codes: BAY-YRC-2388; NBA-061; YRC-2388
Trademarks: Lecs (Bayer CropSci.)
Molecular Formula: C16H20ClN5O2
Molecular Weight: 349.82
Percent Composition: C 54.93%, H 5.76%, Cl 10.13%, N 20.02%, O 9.15%
Literature References: Tetrazolinone herbicide for use in rice. Prepn: T. Goto et al., EP 612735; eidem, US 5362704 (both 1994 to Nihon Bayer). Mode of action study: C. Fedtke et al., Pestic. Sci. 55, 566 (1999). Field trial in combination with propanil on seeded rice: H. Fürsch, Brighton Crop Prot. Conf. - Weeds 1999, 99. Comprehensive review: Y. Yasui et al., ibid. 1997, 67-72. Series of articles on properties, metabolism, and field trials: Pflanzenschutz-Nachr. Bayer (Engl. Ed.) 54, 5-142 (2001).
Properties: Colorless crystals, mp 79°. d20 1.30. Soly at 20° (g/l): pure water 0.0025; tap water (pH 4, 7, 9) 0.0023; n-heptane 20; 2-propanol 32; acetone >250; xylene >250. Vapor pressure at 20° (hPa): 5 ´ 10-10; at 25°: 1 ´ 10-9. Log P (octanol/water): 3.60 at 20°. LD50 in rats (mg/kg): >5000 orally, >5000 dermally. LC50 in rats (mg/m3): >5000 by inhalation. LC50 (48 hr) in carp, rainbow trout (mg/l): 3.2, 3.4 (Yasui).
Melting point: mp 79°
Log P: Log P (octanol/water): 3.60
Density: d20 1.30
Toxicity data: LD50 in rats (mg/kg): >5000 orally, >5000 dermally; LC50 in rats (mg/m3): >5000 by inhalation; LC50 (48 hr) in carp, rainbow trout (mg/l): 3.2, 3.4 (Yasui)
Use: Herbicide. |