7336. Phosmet

Nomenclature

CAS number: 732-11-6
Phosphorodithioic acid S-[(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)methyl] O,O-dimethyl ester; phosphorodithioic acid O,O-dimethyl ester S-ester with N-(mercaptomethyl)phthalimide; O,O-dimethyl S-phthalimidomethyl phosphorothionate; N-(mercaptomethyl)phthalimide S-(O,O-dimethyl phosphorodithioate); phthalophos (USSR); ENT-25705; R-1504; Fosdan (General Quimica); Imidan (Gowan).
C11H12NO4PS2; mol wt 317.32.
C 41.64%, H 3.81%, N 4.41%, O 20.17%, P 9.76%, S 20.21%.

Description and references

Organophosphate insecticide; cholinesterase inhibitor. Prepn: Fancher, US 2767194 (1956 to Stauffer). Activity: B. A. Butt, J. C. Keller, J. Econ. Entomol. 54, 813 (1961). Multiresidue determ in serum and blood: E. Lacassie et al., J. Chromatogr. B 759, 109 (2001) DOI. GC-MS determn in olives: S. C. Cunha et al., Talanta 73, 514 (2007) DOI PubMed. Post-harvest degradation in blueberries: K. M. Crowe et al., J. Agric. Food Chem. 54, 9608 (2006) DOI PubMed. Toxicity study: T. B. Gaines, Toxicol. Appl. Pharmacol. 14, 515 (1969) DOI PubMed.

Chemical structure

Properties

Off-white, crystalline solid, mp 71.9°. Tech product (95-98% pure), mp 66.5-69.5°. Dec below its boiling point. Vapor pressure at 50°: 1 × 10-3 mm Hg. Soly in water at 25°: 25 ppm. LD50 in male, female rats (mg/kg): 113, 160 orally (Gaines).

Use

Insecticide, acaricide.