96035 ⎘
Compounds containing elements of Groups 5 or 15 of the Periodic System; Phosphorus compounds with one or more P—C bonds; Phosphonous acids R—P(OH); Thiophosphonous acids including RHP(=O)(OH); Derivatives thereof the acid moiety containing a substituent or structure which is considered as characteristic Acids or derivatives containing the structure -C(=X)-P(XR)2 or NC-P(XR)2 (X = O, S, Se)