(3-Nitrophenyl)phosphonic acid (m-Nitrophenyl)phosphonic acid 4-16-00-01084 (Beilstein Handbook Reference) 5337-19-9 BRN 2727537 EINECS 226-261-2 NSC 419 Phosphonic acid, (3-nitrophenyl)- Phosphonic acid, (m-nitrophenyl)- m-Nitrobenzenephosphonic acid