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Physical & Chemical properties

Dissociation constant

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Description of key information

In a study conducted to OECD guideline 112 using the titration method, the dissociation constant of DNBP in water was found to be 2.29 x 10-5 mol/L, which equates to a pK value of 4.65 at 21.5°C.

Key value for chemical safety assessment

pKa at 20°C:
4.65

Additional information

A reliability rating of 2 was assigned to the key study, according to the criteria of Klimisch, 1997 as the study was conducted to appropriate OECD guideline although not to GLP. Certain details are not reported in the study report although this is considered not to affect the quality of the relevant results.