Registration Dossier
Registration Dossier
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EC number: 916-226-6 | CAS number: -
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
Daphnia Magna was exposed under static conditions for 48 h to seven concentrations (0.04, 0.1, 0.21, 0.47, 1.03, 2.27 and 5 mg/L) of the test substance. During this expose period, an EC50(48 h) of 0.97 mg/L was determined. Based on this results, the substance has to be classified as very toxic to aquatic organisms.
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 0.97 mg/L
Additional information
The results are expressed in terms of nominal concentrations at 24 and 48 h of exposure. As the test item has not a definite or unique structure and consists of several components, no information about the correlation between molecular weight and the structural formula of the test item are available and no specific analysis was performed. With sponsor’s agreement, the content of the test item during the exposure period was verified by nitrogen and DOC determination.
As the substance consists of multiple constituents, the content of the test item during the exposure period was verified by nitrogen and DOC determination. However, in all samples, the DOC as well as the Nitrogen content were below the detection limit of the respective method and the stability of the test item concentration throughout the test could not be proved. But the results provide evidence that the test item is very toxic towards aquatic organisms. This would result in a classification as R50 and Aquatic Acute 1, respectively being the most strigent classification with respect to environmental hazards. An analytical verification of the test item concentration throughout the test duration would not result in a more stringent classification. Concluding, this toxicity study is classified as acceptable and satisfies the guideline requirements for the actue Daphnia study.
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