P-Aminophenylarsonic acid

The use of arsenic and its organic derivatives as herbicides, pesticides, and wood preservatives has been increasing steadily each year. Large quantities of arsenical compounds are manufactured by the chemical industry and eventually find their way into the environment (l ). About seventy percent of these chemicals are inorganic in form and the rest are organoarsenicals (2). Of the organoarsenicals, the most important species from the point of view of use and health effects are monomethylarsonic acid (MMA), dimethylarsenic acid (DMA), and p-aminophenylarsonic acid (p-APA). 

O, NC-C(NH, >=C-NQ, (Ref 3) diff sol in ale, w and dil inorg acids sol in alkalies aq AcONa. Was first prepd by Benda(Ref 2) by nitrating p-aminophenylarsonic acid. DeLange (Ref 3) prepd it by treating 4-methoxy-3,5 dirutrophenylarsonic acid with ale ammonia, followed by acidification with HC1... 

Arsanilic Acid p-Aminophenylarsonic acid, p-amir l nyUirsinic add)... 

Aminobenzenearsonic acid, 9CI. p-Aminophenylarsonic acid. p-Aminophenylarsinic acid. Arsanilic acid, BAN, INN. 

The rather optimistically-named Atoxyl (p-aminophenylarsonic acid) was discovered in i860 by Bechamp, whose wrongly assigned constitution was corrected later by Ehrlich and Bertheim (1907). 

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