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Short-term toxicity to aquatic invertebrates

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Description of key information

Biofert Plusz showed a low acute toxicity towards Daphnia magna in a study conducted according to OECD Guideline 202 (48 h EC50=677 mg dry matter/L, equivalent to 2410 mg frah material/L nominal).

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
677 mg/L

Additional information

The acute toxicity of Biofert Plusz towards Daphnia magna was investigated in a study conducted according to OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test). 20 daphnids (5 daphnids/replicate) were exposed to Biofert Plusz for 48 h at nominal concentrations ranging from 469 to 3559 mg/L under semi-static conditions. The test material concentration was determined by HPLC based on L-Threonine (main component) measurements. The 48 h EC50 was determined to be 2410 mg fresh material/L, corresponding to 677 mg dry matter/L (nominal). Moreover, a 48 h NOEC=444 mg dry matter/L and a LOEC=667 mg dry matter/L were found. All concentrations in terms of fresh weight. On a dry weight basis the EC50 is 677 mg/L, The NOEC is 444 mg/L and the LOEC is 667 mg/L.