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EC number: 947-548-5
CAS number: -
The inoculum blank should not normally produce more than 40mg/l CO2
(10.9mg/l C) for the test to be valid. A value of 39.3mg/l CO2 (10.7mg/l
C) was recorded.
The toxicity control shows a drop in the rate of degradation around day
7 (see figure 1), this is most likely due to a drop in airflow through
this vessel. The rate of degradation picks up after day 7 following the
restoration of flow rate. The toxicity control is only relevant if low
degradation is achieved by the test chemical. ColaLiquid DC-5 showed
considerable degradation therefore toxicity control data is irrelevant
in this study.
ColaLiquid DC-5 achieved significant biodegradation over the 28 day
period with a maximum of 84% recorded on day 29. This exceeds the >60%
degradation relative to the ThCO2 value required for a pass. However,
the test protocol also requires that a 10-day window is applied to the
degradation results (60% degradation to be reached within 10 days of 10%
of the theoretical ThCO2). This was not achieved (10% reached around day
5 and 60% achieved around day 19), therefore ColaLiquid DC-5 failed to
achieve a pass according to the guideline
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