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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:
2008-02-13
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: comparable to Guideline study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 112 (Dissociation Constants in Water)
GLP compliance:
no
Dissociating properties:
yes
pKa:
10.1
Remarks on result:
other: measurement performed at room temperature on saturated aqueous solution

Parallel measurement of the references substance Ca(OH)2 resulted in the expected value and thus shows the accuracy of the test performance.

Executive summary:

The dissociation constant of substance "reaction mass of calcium hydrogen phosphonate and dialuminium tricalcium hexaoxide" was measured in a study equivalent to OECD Guideline 112 (Dissociation Constants in Water).

The measurement was performed at room temperature on a saturated aqueous solution of the test substance.

The pKa determined was 10.1.

Description of key information

pKa: 10.1 at 20°C
OECD Guideline 112 (Dissociation Constants in Water)

Key value for chemical safety assessment

pKa at 20°C:
10.1

Additional information

The dissociation constant of substance "reaction mass of calcium hydrogen phosphonate and aluminium tricalcium hexaoxide" was measured in a study equivalent to OECD Guideline 112 (Dissociation Constants in Water). The measurement was performed at room temperature on a saturated aqueous solution of the test substance.

The pKa determined was 10.1.

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