Tungsten(IV) iodida membentuk kristal hitam dari sistem kristal triklinik.[5] Tidak larut dalam air dingin, dietil eter, dan kloroform. Larut dalam etanol.[6]
Sifat kimia
Senyawa tersebut terurai ketika dipanaskan dalam ruang hampa:
^Occupational Exposure to Tungsten and Cemented Tungsten Carbide (dalam bahasa Inggris). Department of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health. 1977. hlm. 169. Diakses tanggal 19 March 2024.
^Mullins, William T.; Leddicotte, G. W. (1961). The Radiochemistry of Tungsten (dalam bahasa Inggris). Subcommittee on Radiochemistry, National Academy of Sciences-National Research Council; available from the Office of Technical Services, Department of Commerce. hlm. 10. Diakses tanggal 19 March 2024.