Palladium chloride, is a commonly used precious metal catalyst, molecular formula PaCl2, appearance is brown-red needle-like crystal or powder, easy to deliquesce, relative density 4.0 (18ºC), melting point 500ºC (decomposition), soluble in water, ethanol, hy-drogen bromide Acid and ace-tone. It decomposes and precipitates palladium in a-mmonia chloride, potassium iodide, and a-mmonia solution.

Uses: (1) Use Chemicalbook as analytical reagent, such as the determination of trace palladium, mer-cury, thallium, iodine, etc. (2) Palladium chloride test paper is used to test carbon mon-oxide. (3) It is also used to search for cracks in underground gas pipelines, research on agricultural plant resources, preparation of catalyst palladium, electroplating of watch parts and photography, etc.