3-Nitrophenyl isothiocyanate, also known as 1-isothiocyanato-3-nitrobenzene, is an organic building block containing an isocyanate group. Its enthalpy of vaporization at boiling point has been reported. Some of its physical properties like freezing point, boiling point, density and refractive index have been evaluated. Its synthesis from 3-nitroaniline has been reported.