Phthalonitrile
![Skeletal formula](/Images/godic/202502/02/1,2-Dicyanobenzene.svg1524.png")
![Space-filling model](/Images/godic/202502/02/Phthalonitrile-3D-spacefill1524.png")
![](/Images/godic/202502/02/Synthesis_Metallo_Phthalocyanine.svg1525.png")
Phthalonitrile is an organic compound with the formula C6H4(CN)2, which is an off-white crystal solid at room temperature. It is a derivative of benzene, containing two adjacent nitrile groups. The compound has low solubility in water but is soluble in common organic solvents. The compound is used as a precursor to phthalocyanine and other pigments, fluorescent brighteners, and photographic sensitizers.