... , 6-Tetramethyl Piperidine, free radical 4-Hydroxy TEMPO, CAS NO.: 2226-96-2 4-Hydroxy TEMPO, free radicalChemical name: 4-Hydroxy -2, 2, 6, 6-Tetramethyl ... Piperidine, free radical2, 2, 6, 6-Tetramethyl freeagaoxy-4-piperidyl4-hydroxy-TEMPO (tempol), 4-hydroxy-TEMPO (HTMP), HTEMPOInhibitor 701Retarder 701 Nitric Oxide ScavengersPolymerization inhibitor ...