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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Link to relevant study record(s)

Description of key information

The Henry´s Law constant H is estimated as approx. 30 Pa*m³/mol at ambient temperature, related to the vapour pressure and water solubility of AOH.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
at the temperature of:
20 °C

Additional information

The value derived for Henry's Law constant H relates to the properties of the substance distillates (coal tar), heavy oils (anthracene oil >50 ppm BaP, AOH) except that the molecular weight of the marker substance phenanthrene (178.2 g/mol) is used in the estimation of H.

The constant H for AOH is calculated using the water solubility (WSF) of 3.5 mg C/L (= 0.02 mol/m³) and the vapour pressure of 0.61 Pa, both at 20°C (see Chapter 1.3.). Dimension of H is Pa*m³/mol.

H = 30 Pa*m³/mol

Note: The Henry's Law constant of phenanthrene is about 3.7 Pa*m³/mol (at 25 °C) (EU 2008).