RuClTPPH, a common shorthand for ruthenium(II) chloride triphenylphosphine (e.g., likely a derivative of [RuCl(H)(PPh?)?] or related species), is a phosphine-ligated ruthenium complex. With a typical formula incorporating Ru(II), Cl?, hydride (H?), and triphenylphosphine (PPh?) ligands, it acts as a versatile catalyst in organic synthesis??especially for hydrogenation, hydrosilylation, and C-C coupling reactions. It requires sealed storage under an inert atmosphere (e.g., N?/Ar) to prevent ligand dissociation or oxidation of Ru(II), and should be kept away from moisture/air to maintain catalytic activity for industrial and laboratory applications.