Registration Dossier
Registration Dossier
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EC number: 827-581-0 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Two key studies have been performed to satisfy the ready biodegradability data requirement for SCMI. The first study was performed on SCMI itself and resulted in a biodegradability of 90.4% after 28 days.
The second study was performed on the read-across substance SLMI (Rodrigue. 2007) which achieved 83.9% biodegradation after 28d.
SCMI is therefore concluded to be readily biodegradable and, under the right conditions, will be susceptible to rapid loss within the environment.
Additional information
In a study performed according to OECD 301B, the registered substance SCMI is readily biodegradable (90.4% in 28d). As the substance is a complex mixture whereby sequential degradation of constituents is expected, the 10d window does not apply. However, the substance did actually meet the 10d window criterion.
In a study performed according to OECD 301B, the read-across analogue SLMI is readily biodegradable (83.9% in 28d) and passes the 10day window.
A continuous activated sludge (CAS) test was performed with the read-across analogue 14C- lauryl sulfoethyl ester, sodium salt according to guideline OECD 303A. The protocol was modified so that the fate of the test substance could be assessed at environmentally realistic concentrations using radiolabelled test substance along with un-labelled test substance. The total removal percentage as monitored from day 40 to day 72 range from 99.89 to 99.99% using 14C scintilation counting. This result demonstrates a near complete removal of parent compound at stringent STP considitions (SRT of 6 ± 1 day). Removal of the test substance from the influent through adsorption onto sludge ranged from 0.21 to 0.28%, demonstrating that the test substance was primarily removed by biodegradation (Gore, 2010).
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