Registration Dossier
Registration Dossier
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EC number: 406-810-4 | CAS number: 40649-36-3
Endpoint summary
Administrative data
Description of key information
Biodegradation:
The degradation rate of the test material was 1.2% after 28 days and did not reach 60 % within the 10-day window and after 28 days of incubation. Therefore the test substance cannot be described as ready biodegradable under the test conditions (reference 5.2.1-1).
Additional information
Biodegradation:
The test item was investigated for its ready
biodegradability in a Closed Bottle Test over a period of 28 days
according to OECD TG 301D. The biodegradation was followed by the oxygen
depletion of the microorganisms during exposure. As a reference
substance sodium-n-dodecylsulfate was tested simultaneously under the
same conditions as the test item, and functioned as a procedure control.
The oxygen depletion was measured after 5, 15, and 28 days by means of
an oxygen electrode. Control- and blank-series without the test
substance were run simultaneously and the effectiveness of the inoculum
was confirmed (in a third series with sodium-n-dodecylsulfate as
reference substance) and found to be 72.8 % after 28 days under the
conditions of the test. The value of chemical oxygen demand (TOD) of the
test substance was calculated to be 2.86 mg 02/mg active substance. For
the test substance, a biodegradability of about 1.2 % (after 28 days)
was found. Therefore the test substance cannot be described as ready
biodegradable under the test conditions. Moreover it should be tested,
whether the test substance exerts an inhibiting effect on biological
degradation processes. As a result it was established that the test
substance has no inhibiting effect on the biological degradation of the
reference substance (reference 5 .2.1-1).
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