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Physical & Chemical properties

Dissociation constant

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In a study according to OECD TG 112 (1981), pKa1 = pKa2 = 7.2 was determined for tridecanedioic acid. However only approximately 10 % of the expected amount of NaOH were consumed for this neutralisation, indicating that most of the test substance was undissolved and thereby not available for an effect on pH and for neutralisation. It was concluded that the dissociation constant of tridecanedioic acid cannot be determined according to OECD TG 112 (1981) due to the low water solubility of the substance and the absence of chromophores in the structure that might enable application of the UV method.

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