Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Henry's law constant
Type of information:
Adequacy of study:
supporting study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The reliability of the QSAR result can not be quantified. It is beliewed that the result gives correct basic indication of the volatilization and distribution of the substance in water-air systems.
Justification for type of information:
QSAR prediction: migrated from IUCLID 5.6

Data source

Materials and methods

Test material

Constituent 1
Reference substance name:
EC Number:
EC Name:
Cas Number:
orthosilicic acid

Results and discussion

Henry's Law constant H
< 0 atm m³/mol

Any other information on results incl. tables

Dissolved silica (and silicon) as orthosilicic acid is poorly volatile substance and it partitions pre-dominantly in the aquatic phase. Calculated estimate of volatilisation behaviour of silicic acid from water to air gives Henry’s law constant value 6*10 -16atm*m3/mol indicating no volatilisation.

Applicant's summary and conclusion