Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Physical & Chemical properties

Dissociation constant

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
dissociation constant
Type of information:
experimental study
Adequacy of study:
key study
Study period:
no data
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Principles of method if other than guideline:
Method: other: Potentiometric determination of the ionization constant
GLP compliance:
no
Dissociating properties:
yes
Remarks on result:
other: Acid-base constant: Ka= 2.5 ± 0.3 x 10-5 at 25 ± 0.2 °C and zero ionic strength
Conclusions:
Acid-base constant: Ka= 2.5 ± 0.3 x 10-5 at 25 ± 0.2 °C and zero ionic strength

Description of key information

Halamid (N-chloro-4-methylbenzenesulfonamide sodium)'s Acid-base constant: Ka= 2.5 ± 0.3 x 10-5 at  25 ± 0.2 °C and zero ionic strength

Key value for chemical safety assessment

pKa at 20°C:
0.39

Additional information