Registration Dossier
Registration Dossier
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EC number: 237-769-9 | CAS number: 13981-86-7
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- 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.
Reference
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
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