1-Phenylimidazole is an imidazole derivative. It induces 7-ethoxyresorufin-O-deethylase (EROD) activity in rainbow trout (Oncorhynchus mykiss) hepatocytes. The S(1)→S(0) transition of 1-phenylimidazole has been investigated in a supersonic jet expansion by resonant two-photon ionization. 1-Phenylimidazole is reported to be inhibitor of calmodulin-dependent nitric-oxide synthase from bovine brain and GHs pituitary cells.