1-(2-Hydroxyethyl)-4-hydroxy-2,2,6,6-tetramethylpiperidine 1-Piperidineethanol, 4-hydroxy-2,2,6,6-tetramethyl- 116543-66-9 117247-95-7 4-Hydroxy-2,2,6,6-tetramethylpiperidine-1-ethanol 52722-86-8 EINECS 258-132-1