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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 215-397-8 | CAS number: 1325-54-8 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 40215.
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
The pKa values calculated with ADC/pKa v 12.00 for the sufonate groups are -1.61>pKa>-0.79 and -1.56>pka>-0.79 for the two components of the substance.
Key value for chemical safety assessment
- pKa at 20°C:
- -1.61
Additional information
The pKa values calculated with ADC/pKa, version 12.00, for the sulfonate groups are -1.61<pKa<-0.79 and -1.56<pka<-0.79 respectively for the two main components of the test substance.
Under environmental conditions, the substance dissociates completely in water.
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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