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EC number: 483-360-5
CAS number: 114435-02-8
Table 1 : Measured values of the oxygen content (mg/L) in the test bottles
medium + inoculum
medium + inoculum + sodium acetate
medium + inoculum + sodium acetate + F1EC
medium + inoculum + F1EC
(A) The measured oxygen concentrations after 21 days are lower than
expected. A possible explanation is that there was no equilibrium yet
during the measurement which means that the actual oxygen concentrations
were lower. After 28 days the measured oxygen concentrations are in line
again with the expected values.
The biodegradability of F1EC (MONOFLUOROETHYLENE CARBONATE) was
determined following OECD TG 301D (1992) and according to the OECD GLP
F1EC was added to an aqueous mineral salt medium and exposed to
relatively low numbers of unadapted microorganisms under aerobic
conditions for a period of 28 days. The test compound was the only
source of carbon and energy which was available to micro-organisms. To
follow the biodegradation of F1EC, the oxygen consumption by the
micro-organisms was determined.
The reference compound sodium acetate was degraded for 49% and 58%
within 14 and 28 days respectively. According to OECD TG 301 the
percentage of biodegradation of the reference compound must be higher
than 60% by day 14. As the test compound itself was degraded for > 60%
within 14 days it can still be concluded that the microbial activity of
the inuculum was sufficient.
Sodium acetate was also degraded in the presence of F1EC during the test
period. This indicates that F1EC is not toxic to the micro-organisms at
the tested concentration of 10 mg/L.
F1EC was significantly degraded (i.e. 68% within 14 days) and according
to the guideline F1EC can therefore be classified as readily
FEC was significantly degraded (i.e. 68% within 14 days) and according
to the guideline FEC can therefore be classified as readily
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