2376. Clofentezine

Nomenclature

CAS number: 74115-24-5
3,6-Bis(2-chlorophenyl)-1,2,4,5-tetrazine; bisclofentezin; NC-21314; Apollo (Makhteshim-Agan).
C14H8Cl2N4; mol wt 303.15.
C 55.47%, H 2.66%, Cl 23.39%, N 18.48%.

Description and references

Tetrazine insecticide active against eggs and early motile stages of phytophagous mites. Prepn: J. H. Parsons, EP 5912; idem, US 4237127 (1979, 1980 both to Fisons). Physical properties, toxicity and bioactivity: K. M. G. Bryan et al., Proc. Br. Crop Prot. Conf. - Pests Dis. 1981, 67. LC determn in fruit samples: S. Navickiene, M. L. Ribeiro, J. AOAC Int. 87, 435 (2004) PubMed. Field trial on apple trees: A. J. Read, Proc. 36th N.Z. Weed Pest Control Conf., 261 (1983). Review: F. Rauch, Def. Veg. 39, 11-17 (1985).

Chemical structure

Properties

Magenta solid. Crystals from ethyl acetate, mp 179-182°. Soly: 50 g/l in chloroform; 2.5 g/l in benzene; <1 g/l in hexane; <1 mg/l in water. LD50 in rats, mice (mg/kg): >3200 orally; LC50 (96 hr) in rainbow trout: 100 mg/l (Bryan).

Use

Contact acaricide.