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Physical & Chemical properties

Dissociation constant

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Description of key information

The pKa for formaldehyde is determined to range from 12.79-13.27 at temperatures ranging from 23-30°C.

Key value for chemical safety assessment

Additional information

Three sources were identified concerning the dissociation constant of formaldehyde. According to the online database HSDB (2015) the pKa at 25 °C is 13.27. This value is supported by Reaxys wich reported a pKa of 12.79 at 23 °C (Wadano 1934) and a pKa of 12.87 at 30°C (Levy 1933).