DICHLOROTRIS(1,10-PHENANTHROLINE)RUTHENIUM(II) HYDRATE is a complex compound comprising a ruthenium(II) center coordinated with three 1,10-phenanthroline ligands and two chloride ions, with water molecules as hydrates. Its chemical formula is RuCl₂(phen)₃·nH₂O. This compound is notable for its unique photophysical properties, making it of interest in various applications, particularly in photochemical and photophysical studies.