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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Diss Factsheets

Physical & Chemical properties

Water solubility

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Administrative data

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Description of key information

Experimental water solubility

8.4 g/L at 20°C and pH= 3 (acid, undissociated form)

Estimated water solubilities:

510.7 g/L (acid, dissociated form, at 25°C and pH= 8, environmental conditions)

Key value for chemical safety assessment

Water solubility:
510.7 g/L
at the temperature of:
25 °C

Additional information

In accordance with REACH Regulation 1907/2006, Annex VII, Column 2, testing need not be conducted if the substance is hydrolytically unstable (with a half-life of <12 hours).

The substance rapidly hydrolyses in water to yield the corresponding acid. Water solubility of 1,2-Cyclohexanedicarboxylic acid, 4-methyl- has been investigated in accordance with OECD/EU test methods and determined to be 8.4 g/L at 20 ± 0.5 °C and pH 3.

A water solubility of 510.7 g/L at T= 25°C and pH = 8 (environmental conditions) was estimated for 1,2-Cyclohexanedicarboxylic acid, 4-methyl- (4-MHHPAc), obtained ad hydrolysis product of 5-methylhexahydro-2-benzofuran-1,3-dione (4-MHHPA).

The water solubility as function of pH was estimated taking account of the dissociation of this acid.