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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 204-171-4 | CAS number: 117-08-8
Henry's Law constant
Administrative data
Link to relevant study record(s)
Description of key information
The QSAR determination of the Henry's Law Constant for the hydrolysis product tetrachlorophthalic acid using the model HENRYWIN included in the Estimation Program Interface (EPI) Suite v 4.1 revealed a value of 6.67E-08 Pa*m³/moL at 25°C.
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 0
- at the temperature of:
- 25 °C
Additional information
As tetrachlorophthalic anhydride hydrolysed rapidly in water, the calculated value for the Henry's law constant of 0.194 Pa*m³/mole is only of theroretical interest. The Henry's law constant was therefore calculated for the hydrolysis product tetrachlorophthalic acid (CAS 632-58-6) to be 6.67E-08 Pa*m³/mole, indicating that tetrachlorophthalic acid is of very low volatility from water surfaces.
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.
