In the title compound. [Cu(SO4)(C12H8N2)2]·C2H6O2. the CuII ion is five-coordinated in a distorted square-pyramidal manner by four N atoms from two chelating 1. 10-phenanthroline (phen) ligands and one O atom from a monodentate sulfate anion. https://www.divivoyance.com/product-category/tongue-cleaner/