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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Dissociation constant

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Administrative data

Link to relevant study record(s)

Description of key information

The pKa of 2-methyl-1-heptanol is predicted to be 15.8 using a reliable freely-available method (read-across from a structural analogue, the linear isomer octan-1-ol).

Key value for chemical safety assessment

pKa at 20°C:

Additional information

No measured data for dissociation constant of 2-methyl-1-heptanol were available. The pKa value (normal conditions) was predicted using SPARC for a structural analogue, the linear isomer octan-1-ol. While the hydroxyl group is ionisable, aliphatic alcohols are extremely weak acids and only dissociate under strongly basic conditions. In the range of pH usually considered relevant to the human body and environment, i.e. pH 2-9, 2-methyl-1-heptanol will be non-ionised. There is no need to conduct further testing.