Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Henry's Law constant

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The substance is characterised by a calculated Henry Law Constant between 7.68 E-5 and 1.15 E-4 Pa m³/mol (Currenta, 2010b). According to Thomas, cited in the "Handbook of Chemical property Estimation Methods" (Lyman, 1980), the substance is less volatile than water. Therefore, the substance has to be scored as being non-volatile from water. 

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
at the temperature of:
25 °C

Additional information

The Henry’s law constant (HLC) is directly calculated as the ratio of the vapour pressure (0.001 Pa) to the water solubility (4 to 6 g/L), which are both experimentally determined at 25 °C. The molecular weight (460.56 g/mol) of the substance was also used for the calculation.

As no exact water solubility could be determined, the Henry's Law Constant was calculated for the lower and upper water solubility limit and is thus characterised by a range rather than a single value. According to guidance document R.7a (ECHA, 2008), the estimation based on the vapour pressure and water solubility is acceptable for substances with a water solubility smaller than 1 mol/L.