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Short-term toxicity to aquatic invertebrates

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Description of key information

Acute toxic for aquatic invertebrates: EC50 (48 h) = 5.8 mg/L

Key value for chemical safety assessment

Additional information

Acute toxicity towards invertebrates was tested with the cladocerans Daphnia magna and Daphnia pulex. One 24 h-EC50 is available (Bringmann & Kuehn, 1982), but should only be used as additional information since 48 h-values are available from studies according to OECD guideline 202 (Janssen & Persoone, 1993; Tisler & Zagorc-Koncan, 1997).

Further studies using a number of invertebrate species from a wide array of taxa are reported. LC50s range from 0.42 mg/L to > 100 mg/L In the light of new results (Cooney and Bourgoin 2001 mentioned by Hohreiter and Rigg, 2001) the validity of the lowest value reported for ostracods (Cypridopsis sp.) has recently been questioned (OECD 2004). Thus, the lowest reliable 48h-EC50 for invertebrates is 5.8 mg/L (D. pulex, Tisler and Zagorc-Koncan 1997).

Ref.: D.W. Hohreiter and D.K. Rigg Derivation of ambient water quality criteria for formaldehyde Chemosphere 45: 471 -486 (2001)