1544-68-9 4-12-00-01110 (Beilstein Handbook Reference) 4-Fluorophenyl isothiocyanate BRN 0636596 Benzene, 1-fluoro-4-isothiocyanato- EINECS 216-280-4 ISOTHIOCYANIC ACID, p-FLUOROPHENYL ESTER NSC 78433 p-Fluorophenyl isothiocyanate