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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Reference
Endpoint:
adsorption / desorption: screening
Data waiving:
study technically not feasible
Justification for data waiving:
other:
Justification for type of information:
JUSTIFICATION FOR DATA WAIVING
The adsorption/ desorption screening test is waived on the basis the substance is insoluble in water meaning it is not technically feasible to conduct the study using the HPLC method.
The water solubility of the test material was investigated in accordance with the standardised guidelines OECD 105, EU Method A.6 and OPPTS 830.7840 under GLP conditions. It proved difficult to obtain a solution of the test material for water solubility testing. Under the conditions of this study, the water solubility of the dissolved material was < 0.000728 mg/L. Testing is therefore waived in accordance with Section 2 of REACH Annex XI.

Description of key information

The adsorption/ desorption screening test is waived on the basis the substance is insoluble in water meaning it is not technically feasible to conduct the study using the HPLC method.


The water solubility of the test material was investigated in accordance with the standardised guidelines OECD 105, EU Method A.6 and OPPTS 830.7840 under GLP conditions. It proved difficult to obtain a solution of the test material for water solubility testing. Under the conditions of this study, the water solubility of the dissolved material was < 0.000728 mg/L. Testing is therefore waived in accordance with Section 2 of REACH Annex XI.


For risk assessment purposes the following adsorption/desorption distribution coefficients were obtained for the analogous test materials: lanthanum oxide and cerium carbonate at the soil-to-solution ratio of 1/50:
Mean Koc value: 5480283, 3940404
As a representative value, the lower mean value was used as the key value.


 

Key value for chemical safety assessment

Koc at 20 °C:
3 940 404

Additional information