Boron triiodide

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Boron triiodide[1]
Boron triiodide.svg Boron-triiodide-3D-vdW.png
CAS number 13517-10-7 N
PubChem 83546
ChemSpider 75378 YesY
RTECS number ED7400000
Jmol-3D images Image 1
Molecular formula BI3
Molar mass 391.52 g/mol
Appearance crystalline solid
Density 3.35 g/cm3 (50 °C)
Melting point 49.9 °C (121.8 °F; 323.0 K)
Boiling point 210 °C (410 °F; 483 K)
Solubility in water reacts
Solubility soluble in CCl4, CS2, benzene, chloroform
Dipole moment 0D
Crystal structure trigonal
heat capacity
71 J/mol K
Std molar
200 J/mol K
Std enthalpy of
-37.2 kJ/mol
MSDS Sigma-Aldrich
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 3: Short exposure could cause serious temporary or residual injury. E.g., chlorine gas Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash point −18 °C (0 °F; 255 K)
Related compounds
Related compounds Boron trifluoride
Boron trichloride
Boron tribromide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
Infobox references

Boron triiodide is a chemical compound of boron and iodine with chemical formula BI3. It has a trigonal planar molecular geometry. It is a crystalline solid, which reacts vigorously with water to form boric acid.[2] Its dielectric constant is 5.38 and its heat of vaporization is 40.5 kJ/mol.


Boron triiodide can be prepared by the reaction of boron with iodine at 400 °C.


  1. ^ Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5. 
  2. ^

External links[edit]

LiI BeI2 BI3 CI4 NI3 I2O4, I2O5, I4O9 IF, IF3, IF5, IF7 Ne
NaI MgI2 AlI3 SiI4 PI3, P2I4 S ICl, ICl3 Ar
KI CaI2 Sc TiI4 VI3 Cr MnI2 Fe CoI2 NiI2 CuI ZnI2 Ga2I6 GeI2, GeI4 AsI3 Se IBr Kr
RbI SrI2 Y ZrI4 Nb Mo Tc Ru Rh Pd AgI CdI2 InI3 SnI4, SnI2 SbI3 TeI4 I Xe
CsI BaI2   Hf Ta W Re Os Ir Pt AuI Hg2I2, HgI2 TlI PbI2 BiI3 Po AtI Rn
Fr Ra   Rf Db Sg Bh Hs Mt Ds Rg Cn Uut Fl Uup Lv Uus Uuo
La Ce Pr Nd Pm SmI2 Eu Gd TbI3 Dy Ho Er Tm YbI2 Lu
Ac ThI4 Pa UI3, UI4 Np Pu Am Cm Bk Cf Es Fm Md No Lr