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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Water solubility

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
GLP compliance:
not specified
Type of method:
other: not specified
Key result
Water solubility:
425 other: L gas/ L water
Temp.:
10 °C
Remarks on result:
other: pH value not reported

Hydrogen iodide is extremely soluble in water: at 10 °C, 1 litre of water absorbs 425 litres (~15 mol) of hydrogen iodide gas from atmospheric pressure (corresponding to a molar ratio of HI: H2O of about 1 : 4). The azeotropic mixture of HI and H2O contains 56.7 wt.% HI and 43.3 wt.% H2O.

Conclusions:
The gaseous test item has a water solubility of 425 L gas/L water at 10 °C.
Executive summary:

Hydrogen iodide is extremely soluble in water: at 10 °C, 1 litre of water absorbs 425 litres (~15 mol) of hydrogen iodide gas from atmospheric pressure (corresponding to a molar ratio of HI: H2O of about 1 : 4). The azeotropic mixture of HI and H2O contains 56.7 wt.% HI and 43.3 wt.% H2O. Thus, the liquid solutions of HI have concentration of ca. 57 %.

Description of key information

The gaseous test item has a water solubility of 425 L gas/L water at 10 °C.

Key value for chemical safety assessment

Additional information

Hydrogen iodide is extremely soluble in water: at 10 °C, 1 litre of water absorbs 425 litres (~15 mol) of hydrogen iodide gas from atmospheric pressure (corresponding to a molar ratio of HI: H2O of about 1 : 4). The azeotropic mixture of HI and H2O contains 56.7 wt.% HI and 43.3 wt.% H2O. Thus, the liquid solutions of HI have concentration of ca. 57 % (reference 4.8-1).