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Physical & Chemical properties

Dissociation constant

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Description of key information

In a GLP-study according to OECD test guideline, the test substance is considered as an acid with one proton donator unit, corresponding to pKA = 3.35.

Key value for chemical safety assessment

pKa at 20°C:
3.35

Additional information

In a GLP-study according to OECD test guideline, the test substance is considered as an acid with one proton donator unit, corresponding to pKA = 3.35.First and second determination showed excellent correlation.

Literature (Handbook of Chemistry and Physics, 90thedition, CRC Press) states the pKa of 4-aminobenzoic acid as 3.23.