Registration Dossier
Registration Dossier
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EC number: 203-471-2 | CAS number: 107-19-7
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
After exposure to soil, significant adsorption to solid soil phase (e.g. clay) is not expected.
Key value for chemical safety assessment
- Koc at 20 °C:
- 1.904
Additional information
QSAR-disclaimer
In Article 13 of Regulation (EC) No 1907/2006, it is laid down that information on intrinsic properties of substances may be generated by means other than tests, provided that the conditions set out in Annex XI (of the same Regulation) are met.
According to Annex XI of Regulation (EC) No 1907/2006 (Q)SAR results can be used if (1) the scientific validity of the (Q)SAR model has been established, (2) the substance falls within the applicability domain of the (Q)SAR model, (3) the results are adequate for the purpose of classification and labeling and/or risk assessment and (4) adequate and reliable documentation of the applied method is provided.
For the assessment of the substance, (Q)SAR results were used for the estimation of the adsorption potential. The criteria listed in Annex XI of Regulation (EC) No 1907/2006 are considered to be adequately fulfilled and therefore the endpoint(s) sufficiently covered and suitable for risk assessment.
Therefore, further experimental studies on the adsorption potential are not provided.
Assessment
According to Regulation (EC) No 1907/2006, Annex VIII, Section 9.3.1, Column 2, the study on adsorption/desorption screening does not need to be conducted if based on the physicochemical properties the substance can be expected to have a low potential for adsorption (e.g. the substance has a low octanol water partition coefficient), or the substance and its relevant degradation products decompose rapidly.
The substance has a measured log Kow of -0.35 (BASF AG, 1989; report no. 103758/01; see IUCLID Ch. 4.7). Therefore, a study does not need to be conducted. In addition, the substance is readily biodegradable (CERI, 2001; see IUCLID Ch. 5.2.1)
For assessment purposes, the adsorption coefficient was calculated using KOCWIN v2.00 of EPI Suite v4.11. The substance is within the applicability domain of the MCI and the KOW submodels with a minor deviation. The molecular weight is within the range of the training set,but not within the range of the validation set. However, this deviation is not expected to affect the accuracy of the estimate. The Koc for the uncharged molecule was calculated to be 1.9 L/kg (log Koc = 0.28) using the MCI method of KOCWIN v2.00 (BASF SE, 2022). The KOW method of KOCWIN resulted in a Koc value of 2.1 L/kg (log Koc = 0.32). Both estimated Koc values are almost identical. However, the MCI method is more reliable than the KOW method according to the user guidance of EPI Suite v4.11. Therefore, the data from the MCI method are used in the assessment of the substance.
It can be concluded that the substance is not expected to significantly adsorb to the solid soil phase.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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