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Physical & Chemical properties

Dissociation constant

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Reference
Endpoint:
dissociation constant
Data waiving:
other justification
Justification for data waiving:
other:

Description of key information

According to “ANNEX IX- STANDARD INFORMATION REQUIREMENTS FOR SUBSTANCES MANUFACTURED OR IMPORTED IN QUANTITIES OF 100 TONNES OR MORE, study for Dissociation constant  does not need to be conducted if:
- The substance is readily oxidisable in water.
Expert Judgement
Potassium oxide Reacts violently with water. When water is added to Potassium oxide, Potassium hydroxide is produced.
K2O+H2O→KOH
Therefore testing for Dissociation constant does not need to be performed.
Ref. 1) European Chemicals Agency (ECHA), Guidance for the implementation of REACH, Guidance on information requirements and chemical safety assessment, Chapter R.7a: Endpoint specific guidance, May 2008, pages 168-171.
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Key value for chemical safety assessment

Additional information

According to “ANNEX IX- STANDARD INFORMATION REQUIREMENTS FOR SUBSTANCES MANUFACTURED OR IMPORTED IN QUANTITIES OF 100 TONNES OR MORE, study for Dissociation constant does not need to be conducted if:

- The substance is readily oxidisable in water.

 

Expert Judgement

Potassium oxide Reacts violently with water.When water is added to Potassium oxide, Potassium hydroxide is produced.

K2O+H2O→KOH

 

Therefore testing for Dissociation constant does not need to be performed.

 

 

Ref. 1) European Chemicals Agency (ECHA), Guidance for the implementation of REACH, Guidance on information requirements and chemical safety assessment, Chapter R.7a: Endpoint specific guidance, May 2008, pages 168-171.