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Dissociation constant

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Reference
Endpoint:
dissociation constant
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010-09-16 to 2010-10-14
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 112 (Dissociation Constants in Water)
Version / remarks:
Titration Method
Deviations:
not applicable
GLP compliance:
no
Specific details on test material used for the study:
- Name as cited in study report: Polyetheramine D 230
- Color: colorless
- Lot/Batch number: 000STD77L0
- Test substance receipt: 2010-09-16
- Analytical Purity: 100%
Dissociating properties:
not determined
No.:
#1
pKa:
9.3
Temp.:
24 °C
Remarks on result:
other: Half neutralization potential
Conclusions:
The dissociation constant (pKa) of the test substance was determined to be 9.3 at 24 °C.

Description of key information

The dissociation constant (pKa) of the test substance was determined to be 9.3 at 24 °C (BASF, 2010).

Key value for chemical safety assessment

pKa at 20°C:
9.3

Additional information

The dissociation constant was calculated at 24 °C rather than 20 °C.