Iodine monobromide

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Iodine monobromide
CAS number 7789-33-5 N
PubChem 82238
ChemSpider 74216 N
Jmol-3D images Image 1
Molecular formula IBr
Molar mass 206.904 g/mol
Appearance dark red solid
Melting point 42 °C (108 °F; 315 K)
Boiling point 116 °C (241 °F; 389 K)
Related compounds
Other anions iodine monochloride, iodine monofluoride
Related interhalogen compounds Iodine monochloride
Iodine monofluoride
Bromine monochloride
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Iodine monobromide is an interhalogen compound. It is a dark red solid that melts near room temperature. Like iodine monochloride, IBr is used in some types of iodometry. It serves as a source of I+.


Iodine monobromide is formed when iodine and bromine are combined:[1]

I2 + Br2 → 2 IBr


  1. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0080379419.