(2-Aminophenyl)phosphonic acid (o-Aminophenyl)phosphonic acid 2-Aminobenzenephosphonic acid 4-16-00-01127 (Beilstein Handbook Reference) 7472-16-4 BRN 2937141 NSC 402274 Phosphonic acid, (2-aminophenyl)- (9CI) Phosphonic acid, (o-aminophenyl)-