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Dissociation constant

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dissociation constant
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance is hydrolytically unstable (half-life less than 12 hours)

Description of key information

Data waived

Key value for chemical safety assessment

Additional information

Value used for CSA: IPA: pKa1 = 3.70; pKa2 = 4.60 at 20ºC

Due to the rapid hydrolysis of the test substance, data for the primary degradation product, isophthalic acid, is provided. Since the degradation product has 2 pKa values it will exist as the anionic species in the environment.