7496. Pirimicarb

Nomenclature

CAS number: 23103-98-2
Dimethylcarbamic acid 2-(dimethylamino)-5,6-dimethyl-4-pyrimidinyl ester; 2-(dimethylamino)-5,6-dimethyl-4-pyrimidinyl dimethylcarbamate; 5,6-dimethyl-2-dimethylamino-4-dimethylcarbamoyloxypyrimidine; PP-062; ENT-27766; Aphox (Zeneca); Fernos (Zeneca); Pirimor (Syngenta).
C11H18N4O2; mol wt 238.29.
C 55.44%, H 7.61%, N 23.51%, O 13.43%.

Description and references

Selective aphicide. Prepn: F. L. C. Baranyovits et al., ZA 6701588; eidem, US 3493574 (1968, 1970 to ICI). Activity: F. L. C. Baranyovits, R. Ghosh, Chem. Ind. (London) 1969, 1018. Degradn in soil: I. R. Hill, ACS Symp. Ser. 29, 358 (1976). GLC analysis: P. D. Bland, J. Assoc. Off. Anal. Chem. 64, 1315 (1981).

Chemical structure

Properties

Crystalline solid, mp 90.5°. Vapor pressure at 30°: 3×10-5 mm Hg. Soly in water at 25°: 2.7 g/l. Sol in most organic solvents. Dec by prolonged boiling with acids or alkali. Aq solns are unstable to light. LD50 orally in female rats: 147 (mg/kg) (Baranyovits, Ghosh).

Use

Insecticide.