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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Environmental fate & pathways

Henry's Law constant

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Description of key information

Henry's Law constant (HLC):

3-methylcyclohex-4-ene-1,2-dicarboxylic acid (3-MTHPAc D4): 2.73E-4 Pa-m3/mole

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
0
at the temperature of:
25 °C

Additional information

The Henry's Law constant of 3-methylcyclohex-4-ene-1,2-dicarboxylic acid (3-MTHPAc D4), as hydrolysis product of 1,2,3,6-tetrahydro-3-methylphthalic anhydride (3-MTHPA D4) was estimated to be 2.73E-4 Pa m³/mol at 25°C and is taken into account for further assessments.

The value of 2.73E-4 Pa m³/mol indicates that 3-MTHPAc D4 is essentially non volatile from surface water.