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EC number: 203-312-7
CAS number: 105-59-9
Readily biodegradable (according to OECD criteria) in freshwater.
In a study according to OECD guideline 301
A, the test substance was determined to be readily biodegradable
according to OECD criteria in freshwater systems (BASF AG, 1993; Report
no. 93/1749/21/1). Activated sludge from a laboratory wastewater
treatment system using municipal sewage was used as inoculum. The
substance was degraded to 96% after 18 d. The 10 -d window was kept.
This study was selected as key study.
The biodegradability is supported by further
- BASF AG (1988). Report no. 01.0273/88:
Zahn-Wellens test (OECD 302B), industrial activated sludge: 95% after 14
d: easily eliminated from water/inherently biodegradable
- BASF AG (1994). Report no. 94/0989/29/1:
CO2/DOC Combination test (ultimate aerobic biodegradability, ISO 9439),
industrial activated sludge: > 95% after 15 d: inherently biodegradable
In a ready biodegradability test according
to OECD 301 C, the substance was not readily biodegradable (25% after 28
d; JETOC, 2005).
While the substance is readily biodegradable
in freshwater systems, it is not readily biodegradable in seawater as
concluded from an OECD 306 study (BASF SE, 2011; Report no.
00G0087/01x018). The maximum biodegradation of 15% was reached on day
63, the final day of the study. This result is supported by the
published result from Eide-Haugmo et al. (2009), who determined that the
substance is poorly degradable in seawater in an OECD 306 test (< 10%
BOD of ThOD after 28 d).
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