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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Henry’s law constant (HLC) 

Key value for chemical safety assessment

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

Additional information

There is no standard information requirement for data on Henry’s law constant (HLC) in accordance with REACH regulation. However, it is one of the most important factors in determining the environmental fate of chemicals. In general, for substances with HLC > 100 Pa- m3/mole volatilization is rapid.

The estimated values of 280 -285 Pa-m3/mole obtained from the application of US EPA developed HENRYWIN software correspond with the experimental published data for styrene. Therefore, the volatilization for styrene is rapid.