出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/02/17 14:12 UTC 版)
Arsanilic acid is the organoarsenic compound also called p-aminophenylarsenic acid. This colourless solid was used as a drug in the late 19th and early 20th centuries but is now considered prohibitively toxic. Arsanilic acid is a derivative of phenylarsonic acid with an amine in the 4-position. It exists as a zwitterion, H3N+C6H4AsO3H−, although it is typically represented with the non-zwitterionic formula, H2NC6H4AsO3H2.