| abstract |
O,O'-Dialkyl-O,O'-[2-aminopyrimidin(4,6)diyl]-bis-[(thiono)(thiol)phosphoric(phosphonic) acid esters] of the formula ##STR1## in which R is alkyl, n R 1 is alkyl, alkoxy or alkylthio, n R 2 and R 3 each independently is alkyl or conjointly with the nitrogen atom form a heterocyclic ring which is optionally interrupted by at least one hetero-atom, n R 4 is hydrogen, alkyl or halogen, and n X is oxygen or sulphur, n Which possess arthropodicidal properties. |