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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

The test item L-Cysteine had no acute toxic effects on Daphnia magna up to its solubility limit in test water under the test conditions.
The EC50 is > 100 mg/L.

Key value for chemical safety assessment

Additional information

The acute toxicity of the test item L-Cysteine to Daphnia magna was determined in a 48 hour semi-static test according to the EU Commission Directive 92/69/EEC, Part C.2, the Commission Regulation (EC) No. 440/2008, Part C.2 and the OECD Guideline for Testing of Chemicals, No. 202 (2004).

A limit test was performed in accordance with the test guidelines to demonstrate that the test item has no toxic effect on the test organisms up to and including a nominal concentration of 100 mg/L. Thus, the only nominal concentration tested was 100 mg/L. Additionally, a control group was tested in parallel. In the control and at the test item concentration of 100 mg/L, no immobilized test organisms were observed during the test period of 48 hours.