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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Description of key information

The log Koc value was predicted with the program KOCWIN and with three QSPR methods. The log Koc = 3.571 indicates that the substance is slightly mobile in soil and sediment according to the classification scheme of McCall et al. (1981).


Key value for chemical safety assessment

Koc at 20 °C:
3 723.92

Additional information

Discussion of results

As no single computational model could be identified which would fit completely to this task, the Koc of neononyl acetate eventually was being calculated from the geometric mean of the data generated by four individual QSPR approaches.The four different ways of QSPR computations mostly were based on the experimentally derived log Kow of the test item of 4.6.


Koc (L/kg)

log Koc

Gerstl method


Sabljic and Güsten (esters)


PCKOCWIN Kow method


Sabljic method (hydrophobic substances)


Geometric mean




The resulting geometric mean of log Koc = 3.571 (Koc = 3724 L/kg) is considered as valid as it is being supported by several different QSPR approaches.It is proposed to use the predicted value for the adsorption coefficient of log Koc = 3.571 in the chemical safety assessment.

The substance is considered as "slightly mobile" in sediments and soil (McCall 1981).

Waiving of further adsorption/desorption studies

As additional adsorption/desorption testing cannot expected to reveal new results with any added value concerning the risk assessment of this substance, additional Annex IX studies on adsorption/desorption shall be waived (for more details see "waiver_further studies on adsorption/desorption").

[LogKoc: 3.571]