Triazophos
Title: Triazophos
CAS Registry Number: 24017-47-8
CAS Name: Phosphorothioic acid O,O-diethyl O-(1-phenyl-1H-1,2,4-triazol-3-yl)ester
Additional Names: 1-phenyl-3-(O,O-diethylthionophosphoryl)-1,2,4-triazole
Manufacturers' Codes: HOE-2960
Trademarks: Hostathion (Hoechst)
Molecular Formula: C12H16N3O3PS
Molecular Weight: 313.31
Percent Composition: C 46.00%, H 5.15%, N 13.41%, O 15.32%, P 9.89%, S 10.23%
Literature References: Cholinesterase inhibitor. Prepn: O. Scherer, H Mildenberger, ZA 6803471; eidem, US 3686200 (1968, 1972 both to Hoechst). Properties and analytical methods: W. G. Thier et al. Anal. Methods Pestic. Plant Growth Regul. 10, 127 (1978). Degradation studies: K.-D. Bock et al., Environ. Quality Safety, Suppl. 3 (Pesticides) 833 (1975). GC determn: H.-J. Stan, D. Mrowetz, J. Chromatogr. 279, 173 (1983). Soil adsorption studies: G. S. Rao et al., Indian J. Agric. Sci. 61, 674 (1991). Field studies as insecticide and acaricide: S. J. B. Hay, Proc. 6th Brit. Crop Prot. Council - Insect. Fungic. 597 (1972). Nematicidal activity: A. Sirohi, Siyanand, Indian J. Nematol. 22, 134 (1992).
Properties: Light brown oil, mp 0-5°. Vapor pressure 2.9 ´ 10-6 mbar (303 K). d 1.247. Soly at 296 K: 39 ppm in water. Soly at 298 K (g/100 ml): n-hexane 0.7, toluene 30, ethyl acetate 30, acetone 30, ethanol 30. LD50 in rats (mg/kg): 82 orally, 1100 dermally (Thier). LD50 in rats (mg/kg): 107 i.p.; in rabbits (mg/kg): 280 dermally (Hay).
Melting point: mp 0-5°
Density: d 1.247
Toxicity data: LD50 in rats (mg/kg): 82 orally, 1100 dermally (Thier); LD50 in rats (mg/kg): 107 i.p.; in rabbits (mg/kg): 280 dermally (Hay)
Use: Pesticide.

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