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Physical & Chemical properties

Dissociation constant

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Description of key information

Based on the estimated pKa-range (4.2- 5.0) under environmental conditions (pH 5 - 9) this substance is mainly present in undissociated form (Currenta, 2010).

Key value for chemical safety assessment

Additional information

According to QSAR estimation, this substance does not have a significant dissociation at pH 5 - 9, and hence this estimate can be used for chemical safety assessment. On the other hand TMQ is mostly insoluble and it is scientifically very difficult to perform a test due to the lack of sensitive analytical method.