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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Justification for type of information:
QSAR prediction: migrated from IUCLID 5.6
Read-across from structural analogue 68555-22-6. See justification document in section 13.
Reason / purpose for cross-reference:
read-across source
Guideline:
other: REACH Guidance on QSARs R6, May/July 2008
Principles of method if other than guideline:
General model for pKa
Dissociating properties:
yes
No.:
#1
pKa:
ca. 10.2
Temp.:
20 °C
No.:
#2
pKa:
ca. 9
Temp.:
20 °C
No.:
#3
pKa:
ca. 6.4
Temp.:
20 °C
No.:
#4
pKa:
ca. 3.4
Temp.:
20 °C

Description of key information

Read-across from structural analogue 68555 -22 -6

Based on QSAR predictions by SPARC on-line.

Key value for chemical safety assessment

pKa at 20°C:
10.2

Additional information

Based on predictions the pKa are 10.2, 9.0, 6.4 and 3.4