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EC number: 948-066-8 | CAS number: -
Table 4:Cumulative mortality data in the Definitive Test
Cumulative mortality[number of fish]
(initial population = 7 fish)
The body weight of 7 fish was weighed at the start of the test. The measured and calculated data are listed below in Table 5.
Table 5: Measured and calculated data of bodyweight
Measured weightof 7 fish (g)
Calculated meanweight of 1 fish (g)
Loading of testing aquarium(g fish/Ltesting liquid)
There was no considerable difference observed concerning body weights between the groups.
The acute toxicity ofthe test itemwas assessed with acute fish toxicity test onZebrafish (Brachydanio rerio), over an exposure period of 96 hours in a semi-static system.
Concentrations were selected based on the results of a preliminary experiment. Because significant toxicity was observed at the examined concentration levels during the preliminary range-finding test,five test concentrations in a geometric serieswith a separation factor of 2.0and one untreated control group were tested in the main experiment under semi-static conditions.
The nominal loading rates of test item used in the main experiment were 6.25, 12.5, 25, 50 and 100 mg/L.
The test concentrationswereanalytically determined at the start and at the end of the first and at the last renewal periods.The corresponding measured geometric mean test item concentrations were: 6.13; 11.08; 23.07; 47.41 and 99.03 mg/L.
As the measured concentrations deviated not more than 20% from the nominal concentrations (except of the end sample of the last renewal period at 12.5 mg/L concentration), biological results are based on thenominal loading rates of test item.
One aquarium was used in each test group and one in the control group. Each aquarium comprised seven fish and five litre test solution.
The24, 48, 72 and 96 hours LC50values of the test item, the NOEC, LOEC and LC100values were determined from the raw data.
All validity criteria were met during this study.
Under the conditions of this acute fish toxicity studyon Zebrafish (Brachydanio rerio)the observed and calculated endpoints for the effect ofEthanol, 2-(2-butoxyethoxy)-, reaction products with phosphorus oxide (P2O5), compds. with N,N-dimethylcyclohexanaminewere the following:
The 24h, 48h, 72h and 96h LC50value: > 100 mg/L (nominal)
The 96h LC100value: > 100 mg/L (nominal)
The 96h No-Observed Effect Concentration (NOEC): 25 mg/L (nominal)
The 96h Lowest Observed Effect Concentration (LOEC): 50 mg/L (nominal)
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