Antimony pentachloride is a colorless or yellow liquid. It releases toxic and odorous (bad odor) fumes in air. It melts at 2.8°C and boils at 140°C. It reacts with water to make antimony pentoxide and hydrochloric acid. It dissolves in hydrochloric acid. It dissolves in chloroform. It absorbs water to form a solid hydrate. It is a strong oxidizing agent.