Synonyms: Phenol,p-nitro-, di-H phosphate, disodium salt (7CI);Phenol, p-nitro-, phosphatedisodium salt (6CI);Phosphoric acid, mono(4-nitrophenyl) ester, disodium salt(9CI);4-Nitrophenyl phosphate disodium salt;Disodium mono(4-nitrophenyl) phosphate;Disodium p-nitrophenyl phosphate;p-NPPdisodium salt;p-Nitrophenyl disodium phosphate;p-Nitrophenyl phosphatedisodium salt;