Research on the synthesis of Schiff Base and its application as a detecting for heavy metal ion Cadmium in water medium has been successfully carried out. First, the Schiff Base synthesis 2-[(phenylamino)methyl]phenol was perfomed using the reflux synthesis method. The Schiff Base synthesis was used 2-hydroxy benzaldehyde and aniline as a main precursor in ethanol solvent. The synthesized produ…