Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 284-325-5 | CAS number: 84852-15-3
Henry's Law constant
Administrative data
Link to relevant study record(s)
Description of key information
Staples et al. (2008) conducted a literature review with regard to Henry Law Constant (HLC) of Nonylphenol (NP). The value for HLC reported in the EU Risk Assessment report, 2002, was estimated by calculation.
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 11.02
- at the temperature of:
- 20 °C
Additional information
HLC has been reported for NP ranging widely from about 0.08 to 11.02 Pa m 3 /mol at 20 to 25 °C (Dachs et al. 1999; Mackay 2001a; EC 2002; Lalah et al. 2003;all references cited in Staples, 2008). From these data, Mackay (2001a) estimated a value of 2.84 Pa m³ /mol for use in multimedia modeling.
The calculation reported in the EU Risk Assessment report, 2002, is based on the vapour pressure, molecular weight and water solubility of the substance using the following equation:
HENRY = VP • MOLW / SOL
Explanation of symbols:
- VP = vapour pressure [Pa]
- MOLW = molecular weight [g/mol]
- SOL = solubility [mg/l]
- HENRY = Henry's law constant [Pa m³/mol]
Using a vapour pressure of 0.3 Pa, a molecular weight of 220.34 g/mol and a water solubility of 6 mg/l gives a Henry’s law constant for nonylphenol of 11.02 Pa m³/mol.
This calculated value is in agreement with the experimental value cited in Staples et al. (2008) and should be used as key value for chemical safety assessment.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
