4-Hydroxy-N,N,N-trimethylbenzenaminium iodide 6545-97-7 AMMONIUM, (p-HYDROXYPHENYL)TRIMETHYL-, IODIDE Benzenaminium, 4-hydroxy-N,N,N-trimethyl-, iodide (9CI) PTMA Trimophonium iodide p-(Dimethylamino)phenol methiodide