Registration Dossier
Registration Dossier
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EC number: 204-812-8 | CAS number: 126-92-1
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
log Koc between 1.88 and 2.0 (experimental data)
Koc between 75 and 101 (experimental data)
Key value for chemical safety assessment
- Koc at 20 °C:
- 75
Additional information
Since no reliable sorption tests are available for C8-isoAS Na (CAS 126-92-1), in accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5, a read-across to another structurally related category member was conducted. Read-across data from another C8 alkyl sulfate (CAS 142-31-4). In the publication of Marchesi et al. (1991), sediment sorption data for several alkyl sulfates with different carbon chain lengths are presented. Koc value is dependent on the carbon chain length and increases with the increasing chain. The C8AS Na homologue (CAS 142-31-4) is indicated to be of low sorption potential. The determined Koc values are between 75 and 101 which corresponds to the log Koc values in the range of 1.88 and 2.0. Due to structural and property similarities with the tested category member it can be concluded that the above result applies also to C8-isoAS Na (CAS 126-92-1). For the PNEC sediment and soil derivation, according to the equilibrium partitioning method (EPM), the lower boundary of the range (Koc = 75) was taken into account, since this value represent the worst case scenario for the chemical safety assessment.
[LogKoc: 1.88]
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