Ruthenium trichloride is a chemical substance with the molecular formula RuCl3. It is a glossy crystal particle, generally gray brown or dark red in color, corrosive, easily deliquescent, soluble in water, alcohol, and ethyl acetate, and decomposes in hot water. Used for important chemical raw materials such as multiphase catalysis or homogeneous catalysis, electroplating, electrolytic anodes, and electronics industry.

Ruthenium trichloride, also known as ruthenium chloride. RuCl3=207.43, red brown or black leaf shaped crystals, easily hygroscopic. Relative density 3.11, decomposes into elemental substances above 500 ℃. Insoluble in cold water and carbon disulfide, decomposes in hot water, and insoluble in ethanol. When reacting with potassium iodide solution, iodide precipitates are formed. When hydrogen sulfide is introduced into the solution, the precipitate is ruthenium trisulfide, which can chemically react with ammonia, potassium nitrite, and other coordination agents to form corresponding ammonia, cyanide, and nitroso complexes. When reacting with sodium amalgam or titanium chloride, it is reduced to blue divalent ruthenium ions. At high temperatures, metal ruthenium can be directly combined with chlorine, or salt can be added to ruthenium hydroxide, which can be obtained through evaporation, concentration, and crystallization. Used for the determination of sulfites, manufacturing of chlororuthenium salts, and as electrode coating materials.