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EC number: 200-293-7 | CAS number: 56-86-0
This study was designed to assess the acute toxicity of the test substance, L-glutamic acid, on the immobilisation of Daphnia magna during the exposure period of 48 hours under static test conditions and to determine the EC50 (median effect concentration) for the immobilisation of Daphnia magna and the No Observed Effect Concentration (NOEC). The nominal concentration was set at 100 mg/L, and the control group was prepared for this study. The concentration at the end of exposure exceeded (+/-) 20% of the measured initial values. Therefore, all test results were determined the geometric means. During the exposure period, the percentage of immobilisation in the control group was below 10%, and no abnormal signs such as trapping at surface of water were found. As a result of the definitive test, the percentage of immobilisation was less than 50% in the highest concentration treatment group during the exposure period, so the EC50 at 24 and 48 hours was determined >83.14 mg/L, respectively. And, the No Observed Effect Concentration (NOEC) was determined 83.14 mg/L.
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