dark brown to black-grey crystals or granules
Phosphorus Triiodide is used in the structure-?property-?reactivity studies of dithiaphospholes.
Phosphorus triiodide (PI3) is a trihalide of phosphorus that can be used as a deactivator and a deoxygenating agent.
It decomposes in moist air and must be kept in a desiccator over CaCl2. It is crystallised from sulfur-free CS2; otherwise the m decreases to ca 55o. It is best to prepare it freshly. [Germann & Traxler J Am Chem Soc 49 307 1927, Klement in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 541 1963.] HARMFUL VAPOURS.
