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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

water solubility
Type of information:
experimental study
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Reputable handbook of values for physical - chemical properties. Limited data is provided on methodology. Klimisch 2

Data source

Reference Type:
review article or handbook
Cyano compounds, inorganic
Gail E, Gos S, Kulzer R, Lorösach J, Rubo A, Sauer M.
Bibliographic source:
Ullmannn's Encyclopedia of Industrial Chemistry, Sixth Edition, VCH-Verlag, Weinheim, Germany, pp 159-189

Materials and methods

Test guideline
no guideline required
Principles of method if other than guideline:
This data is obtained from a reputable handbook of values for physical - chemical properties. Methodology was not specified, but it is assumed to be based on methods found in existing guidelines. Current experience with handling this substance indicates that this data is valid.
Type of method:
other: Handbook data; method not described

Test material

Constituent 1
Chemical structure
Reference substance name:
Hydrogen cyanide
EC Number:
EC Name:
Hydrogen cyanide
Cas Number:
Molecular formula:
hydrogen cyanide

Results and discussion

Water solubility
Water solubility:
>= 100 vol%
20 °C
ca. 7
Details on results:
No limit. Miscible in all ratios.

Applicant's summary and conclusion

Interpretation of results (migrated information): very soluble (> 10000 mg/L)
According to Ullmann's Encyclopedia of Industrial Chemistry the water solubility of HCN is miscible in all proportions. No Limit (miscible in all ratios).
Executive summary:

The water solubility of HCN is very high; it is miscible in all proportions. No Limit (miscible in all ratios).