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Physical & Chemical properties

Dissociation constant

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Description of key information

Dissociation constants at 20°C:

pKa1 = 4.42

pKa2 = 6.93

Key value for chemical safety assessment

pKa at 20°C:
4.42

Additional information

The dissociation constants in water of methylbicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid (METHAc), as hydrolysis product of  1,2,3,6-tetrahydromethyl-3,6-methanophthalic anhydride (METH) at 20 ± 1 °C were determined to be: pKa1 = 4.42 and pKa2 = 6.93..