Registration Dossier
Registration Dossier
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EC number: 939-579-8 | CAS number: -
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
pKa : 4.5 - 5.9
Key value for chemical safety assessment
Additional information
One dissociation constant pKa of the test item was determined by means of the spectral photometric method according to OECD guideline N° 112, under GLP.
The study was considered as reliable with restriction because the pure lyophilised substance was not tested but the test material contains 45.6%w/w of water (as marketed). In addition, even after 5 determinations, the dissociation constant was not replicated to within±0.1 log units. It may be due to the chemical structure of the test item, which shows different functional groups with different pKa values.
As final result the pKa of the test item was given as a range and not as a definite value : pKa : 4.5 - 5.9.
The pKa range was retained as key data for purpose of CSA.
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.
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