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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 428-880-5 | CAS number: -
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
not applicable
Key value for chemical safety assessment
Additional information
The substance is a salt and is reaction product of acids and bases that retain their ionic character. In water the substance is completely dissociated.
Additionally, the substance contains multiple ionisable functionalites, thus the pKa values have been calculated for each dissociated species likely to exist in solution at 25°C. The calculation was using recommended software SPARCv4.6 and the results are given as follows:
pKa1= 0.7 (-SO3H, sulphonic acid group)
pKa2= 3.8 (-CO2H, carboxy group)
pKa3= 10.8 (-OH, hydroxy group)
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.
