1,10-Phenanthroline monohydrate（Cat No.:R070854）is a heterocyclic organic compound with the formula C12H8N2·H2O, consisting of a planar, fused-ring system with nitrogen atoms at the 1 and 10 positions, along with one molecule of water. It is a white to pale yellow crystalline solid and serves as a versatile bidentate ligand in coordination chemistry, forming stable complexes with a variety of metal ions. It is widely used in analytical chemistry, particularly in redox titrations (e.g., iron determination), and in catalysis, molecular sensing, and DNA-binding studies due to its strong metal-chelating and intercalating properties.