13-04281. Fospirate [Archived]

Nomenclature

CAS number: 5598-52-7

Dimethylphosphoric acid 3,5,6-trichloro-2-pyridinyl ester; O,O-dimethyl-O-3,5,6-trichloro-2-pyridyl phosphate; Dowco 217; Torelle (Dow).

C₇H₇Cl₃NO₄P; mol wt 306.47.

C 27.43%, H 2.30%, Cl 34.70%, N 4.57%, O 20.88%, P 10.11%.

Prepn by reaction of 3,5,6-trihalo-2-pyridinol with phosphoryl chloride: Rigterink, Kenaga, J. Agric. Food Chem. 14, 304 (1966).

Crystals from petr ether, mp 86.5-88°.

Anthelmintic.

This monograph has been retired and is no longer subject to revision or update.