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Diss Factsheets

Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

Description of key information

EC50 > 67mg/l

Key value for chemical safety assessment

Additional information

There are no experimental available data of the target substance, thus the information on the Similar Substance 02 have been taken into account. The structural differences occurring between the target substance and Similar Substance 02 are not expected to significantly impact the toxicity to aquatic invertebrates (details in the document attached to the IUCLID section 13).

The short term toxicity to aquatic invertebrates was determined according to the OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test).

Although the test substance is soluble in pure (deionised) water ( about 80 g/l), most of the test substance in the stock solution settled down and build a sediment at the bottom of the flask. This effect was possibly caused by a reaction of the test substance with the water hardness compounds in the test water. For the preparation of the test concentrations only the supernatant of the stock solution was taken ( limit of the solubility ). The reported results are related to the actual mean values of the analysed concentrations of the test article measured at the beginning and at the end of the test. No immobilization and abnormal behaviour of the Daphnia was observed in the controls. The NOEC value after 48 hours was determined to be 34 mg/l, the EC50 and the EC 100 value could not be calculated, but are clearly higher than 67 mg/l.