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EC number: 943-359-7
CAS number: -
Nominal Concentration in mg/L
Immobility 24 hours
Immobility 48 hours
NominalConcentration Test Item
Concentration t = 0 h
Measured Concentration t = 24 h old
Concentrationt = 24 h new
Concentration t = 48 h
The short term toxicity of MAEEBP against Daphnia magna STRAUS was tested according to OECD 202 resp. EU C.2. For each test concentration, 20 Daphnia were exposed to the test item (46 / 22 / 10 / 4.6 / 2.2 mg) for 48 hours in a semi static test system. After 24 and 48 hours, the immobilised Daphnia were counted. 3 concentrations showed toxicity between 65 and 100% immobilisation after 48 hours. None of the animals were immobilised in the control. Potassium dichromate K2Cr2O7(CAS No. 7778-50-9) was used as positive control in a current reference study.The 24h-EC50 value was determined as 1.6 mg/L, lying within the demanded range of 0.6 – 1.7 mg/L stated in the EU guideline.
The concentration of the test item in the test solutions was determined using HPLC measurement at the start and at the end of the test and at medium renewal after 24 hours. Because of the limited solubility in test medium the correlation between nominal and measured concentration was weak and the measured concentrations in the higher concentrated treatments were in a similar range. Therefore, the determination of the results was based on the geometric mean of the measured concentrations.
The following results were determined for the test item MAEEBP(species:Daphnia magna).
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