9606. Triazophos

Nomenclature

CAS number: 24017-47-8
Phosphorothioic acid O,O-diethyl O-(1-phenyl-1H-1,2,4-triazol-3-yl) ester; 1-phenyl-3-(O,O-diethylthionophosphoryl)-1,2,4-triazole; O,O-diethyl O-1-phenyl-1H-1,2,4-triazol-3-yl phosphorothioate; HOE-2960; Hostathion (Bayer CropSci.).
C12H16N3O3PS; mol wt 313.31.
C 46.00%, H 5.15%, N 13.41%, O 15.32%, P 9.89%, S 10.23%.

Description and references

Organophosphate insecticide; 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). Immunochromatographic determn in soil and water: W.-J. Gui et al., Anal. Biochem. 377, 202 (2008) DOI PubMed. Field studies as insecticide and acaricide: S. J. B. Hay, Proc. 6th Brit. Crop Prot. Council - Insect. Fungic. 597 (1972). Nematocidal activity: A. Sirohi, Siyanand, Indian J. Nematol. 22, 134 (1992). Residues and dissipation rates in soil and wheat crops: W. Li et al., Ecotoxicol. Environ. Saf. 69, 312 (2008) DOI PubMed.

Chemical structure

Properties

Light brown oil, mp 0-5°. Vapor pressure 2.9 × 106 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).

Use

Insecticide; acaricide; nematocide.