4664. Heptenophos

Nomenclature

CAS number: 23560-59-0
Phosphoric acid 7-chlorobicyclo[3.2.0]hepta-2,6-dien-6-yl dimethyl ester; 7-chlorobicyclo[3.2.0]hepta-2,6-dien-6-yl dimethylphosphate; O,O-dimethyl O-[7-chlorobicyclo[3.2.0]hepta-2,6-dien-6-yl]phosphate; HOE-2982; Ragadan (Intervet); Hostaquick (Bayer CropSci.).
C9H12ClO4P; mol wt 250.62.
C 43.13%, H 4.83%, Cl 14.15%, O 25.54%, P 12.36%.

Description and references

Organophosphate insecticide; cholinesterase inhibitor. Prepn: B. Bhner, K. Rüfenacht, ZA 6706947; eidem, US 3600474 (1968, 1971 both to Geigy). Activity in food crops: R. T. Hewson, Proc. 8th Br. Insectic. Fungic. Conf. 2, 697 (1975). Efficacy vs ectoparasites: W. Bonin, ibid. 705. Degradation in soil: W. Schwab et al., J. Agric. Food Chem. 42, 1578 (1994) DOI.

Chemical structure

Properties

Pale amber liquid, bp0.001 94-95°. d420 1.294. Vapor pressure at 20°: 7.5 × 104 mm Hg. Sol in xylene, acetone, methanol. LD50 orally in rats: 96-117 mg/kg (Hewson).

Use

Insecticide.

Therapeutic Category (Veterinary)

Ectoparasiticide.