(4-nitrophenoxy)phosphonic acid 330-13-2 4-Nitrophenyl dihydrogen phosphate 4-nitrophenyl phosphate PNPP Phenol, p-nitro-, dihydrogen phosphate (6CI) Phosphoric acid, mono(4-nitrophenyl) ester (9CI) Phosphoric acid, mono(p-nitrophenyl) ester (8CI) Phosphoric acid, para-nitrophenyl ester (6CI) p-Nitrophenol phosphate p-Nitrophenyl dihydrogen phosphate p-Nitrophenyl phosphate phosphoric acid, mono(4-nitrophenyl) ester