4. Under the ordinary conditions found successful for condensing halogenophenylarsonic acids 2-chloro-5-aminophenylarsonic acid did not condense with itself, isoamylamine, ethanolamine or p-chlorophenol, and its acetyl derivative did not react with aniline or p- chlorophenol. All attempted condensations between 2-chloro-5-hydroxyphenylarsonic acid and itself, ethanolamine or pchlorophenol, and between its carbethoxy derivative and ...