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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

48 hour EC0 for Daphnia magna: 12.5 mg/L

48 hour EC50 for Daphnia magna: 26.8 mg/L

24 hour EC50 for Daphnia magna: 43.5 mg/L

48 hour EC100 for Daphnia magna: 100 mg/L

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
26.8 mg/L

Additional information

The 1,4 -butynediol 48 hour EC50 for aquatic invertebrates (Daphnia magna) provided in an EPA-660/3 75-009 guideline study is 26.8 mg/L (BASF AG 1987). This value is supportedby the results of an OECD 201 guideline-equivalent study which reports a 48 hour EC50 of 30.2 mg/L (Tisler 2003).