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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Adsorption / desorption

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Administrative data

Link to relevant study record(s)

Description of key information

For the non-dissociated formic acid as well as for the dissociated form (formate ion), significant adsorption to solid soil phase (e.g. clay) is not expected.

Key value for chemical safety assessment

Koc at 20 °C:

Additional information

The log Koc of the non-dissociated species of formic acid was measured to be < 1.25 in a GLP test according to OECD guideline 121. As this value refers to the uncharged molecule, which will only be present under highly acidic conditions, the Koc and logKoc of the dissociated, charged form at realistic environmental pH values was calculated by using the pKa (= 3.70) and the logPow of the uncharged molecule (= -0.46) for a corrected logKoc according to Franco et al. (2008). For the formate ion which will be present at environmental relevant pH values, slightly higher adsorption rates were estimated (Koc = 31, log Koc = 1.49) (BASF SE, 2009).