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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Reference
Endpoint:
dissociation constant
Type of information:
(Q)SAR
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
Justification for type of information:
QSAR prediction: This value is derived using an accepted calculation method
Qualifier:
according to guideline
Guideline:
other: QSAR model
Principles of method if other than guideline:
Structure-based QSAR property prediction by means of linear free energy relationships and molecular orbital properties.
GLP compliance:
no
Remarks:
not applicable. QSAR model
Dissociating properties:
yes
No.:
#1
pKa:
0.7
Temp.:
20 °C
Remarks on result:
other: Strongest pKa(Acid): 0.70 +/- 0.50

An estimated pKa of 0.7 indicates that this acid is fully dissociated in the environmental pH range 4 to 9.

Conclusions:
A dissociation constant value of 0.7 was obtained using an accepted calculation method. The result is considered to be reliable
Executive summary:

A dissociation constant value of 0.7 was obtained using an accepted calculation method. The result is considered to be reliable

Description of key information

A dissociation constant value of0.7 was obtained using an accepted calculation method. The result is considered to be reliable

Key value for chemical safety assessment

pKa at 20°C:
0.7

Additional information

A dissociation constant value of 0.7 was obtained using an accepted calculation method. The result is considered to be reliable