Tetraamminepalladium(II) chloride monohydrate, also known as [Pd(NH3)4]Cl2·H2O, is a hydrated palladium complex widely used in coordination chemistry and catalysis. It consists of a palladium cation coordinated with four ammonia molecules, two chloride ions, and one water molecule. This compound exhibits unique properties that make it a valuable catalyst in various organic transformations, such as hydrogenation and C-C bond formation reactions. Tetraamminepalladium(II) chloride monohydrate plays a crucial role in the synthesis of fine chemicals, pharmaceuticals, and specialty materials due to its efficient catalytic activity.