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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 295-556-6 | CAS number: 92077-08-2
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
According to REACH regulation - Annex IX - Chapter 7.16 - Column 2 a dissociation constant study does not need to be conducted if the substance is hydrolytically unstable at pH 4, 7 and 9 (half-life less than 12 hours). The half live rates are <2h at any measured pH in a OECD111 study (s. IUCLID chapter 5.1.2). Therefore the test could not be performed. Instead a dissociation constant with the hydrolytical product Tripropenyl succinic acid was determined.
The calculated pKa values of Tripropenyl succinic acid at 25°C are:
pKa1 (BH- + H+ ⇌ BH2): 5.14 ± 0.19
pKa2 (B-- + H+ ⇌ BH-): 4.34 ± 0.23
Key value for chemical safety assessment
- pKa at 20°C:
- 5.14
Additional information
According to REACH regulation - Annex IX - Chapter 7.16 - Column 2 a dissociation constant study does not need to be conducted if the substance is hydrolytically unstable at pH 4, 7 and 9 (half-life less than 12 hours). The half live rates are <2h at any measured pH in a OECD111 study (s. IUCLID chapter 5.1.2). Therefore the test could not be performed. Instead a dissociation constant with the hydrolytical product Tripropenyl succinic acid was determined.
The calculated pKa values of Tripropenyl succinic acid at 25°C are:
pKa1 (BH- + H+ ⇌ BH2): 5.14 ± 0.19
pKa2 (B-- + H+ ⇌ BH-): 4.34 ± 0.23
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.
