Registration Dossier
Registration Dossier
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EC number: 402-950-5 | CAS number: 87826-41-3 CLEARLITE NU 005; DISORBENE M; GENISET MD; GLC NU 005; MILLAD 3940; NU 005
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
The adsorption coefficient (Koc) of the test material has been determined to be 296, log10 Koc 2.47.
(Please note the value entered into the result box below is for the Koc at a temperature of 30 deg C and not 20 deg C).
Key value for chemical safety assessment
- Koc at 20 °C:
- 296
Additional information
A Koc of 296 and a log10 Koc of 2.47 was determined for the test material, using the HPLC screening method, Method C19 of Commission Directive 2001/59/EC.
The method guideline states that the measurement of adsorption coefficient should be carried out on substances in their ionised and unionised forms. However, the dissociation constants of certain functional groups found in the test material made it impossible to satisfy this criterion. Testing would be required at greater than pH 14 to obtain the test material in its ionised form. As a consequence of this, the functional groups will always be present in their unionised forms. Therefore, as pH 14 or above is outside the environmental pH range for this test and also experimentally impractical, testing was carried out at approximately neutral pH with the functional group unionised (the predicted values of pKa were obtained using the ACD/I-Lab Web Service (ACD/pKa 8.03)).
[LogKoc: 2.47]
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