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Henry's Law constant

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Description of key information

Henry's Law constants at 25 deg C:

5-methylbicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid (5-METHAc): 6.05E-07 Pa m³/mol

1-methylbicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid (4-METHAc) was estimated to be 5.13E-07 Pa m³/mol

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
at the temperature of:
25 °C

Additional information

The Henry's Law constants were estimated using the software HENRYWIN (v3.20).

The HLCs of methylbicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid (METHAc) in its identified isomeric forms, as hydrolysis products of 1,2,3,6-tetrahydromethyl-3,6-methanophthalic anhydride, were considered for the environmental assessment.

The value of 5.6E-07 Pa m³/mol, as a mean of estimated values, indicates that METHAc is essentially non volatile from surface water.