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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

adsorption / desorption: screening
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance has a low octanol water partition coefficient and the adsorption potential of this substance is related to this parameter

Description of key information

Since the test substance's physicochemical properties indicate a low potential for adsorption, no study needed to be conducted according to REACH Annex VIII 9.3.1 column 2, and REACH Annex IX 9.3.3 column 2.

It is adequate to waive the testing requirement based on the low log Kow as the adsorptive properties of the substance are solely driven by lipophilicity as the substance is not surface active or ionisable at environmental pH (pH 4 – 9).

The Koc of the substance was calculated to be 10.5 L/kg and 1.4 L/kg (logKoc = 1.0 and 0.15) following the Molecular Connectivity Index and the Log Kow method, respectively (KocWIN, US EPA, 2011).

Key value for chemical safety assessment

Koc at 20 °C:

Additional information

QSAR estimates of the Koc were made (KocWIN, US EPA, 2011) showing Koc values of 10.5 L/kg and 1.4 L/kg (logKoc = 1.0 and 0.15) following the Molecular Connectivity Index and the Log Kow method, respectively. The mean value (Koc = 6 L/kg; log Koc = 0.8) was taken for the chemical safety assessment. As the pKa of NMMO is relatively low (5.1), this substance is considered to be predominantly in its non-ionised form under environmentally relevant conditions and no correction for the charged molecule was made.

[LogKoc: 0.8]