«Ammonium tetrachloropalladate (II)» is an inorganic compound, a complex chloride of palladium metal and ammonium (ammonium salt of tetrachloropalladic acid).

Chemical formula: (NH4)2[PdCl4].

Some properties:

forms dark green crystals;
molar mass: 284.31 g/mol;
density: 2.17 g/cm³;
soluble in water, insoluble in ethanol.
CAS number: 13820-40-1.

Applications: used to produce metallic palladium particles, and also forms Pd-creatinine complexes, which are used in catalysis and semiconductors.