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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

Key Value has been selected from Seeland publication representing a clearly more sensitive species of daphnids (non-standard test organism) in freshwater. Key value for marine invertebrates has been derived from guideline study with Acartia Tonsa representing marine invertebrates.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
15.8 mg/L
EC50/LC50 for marine water invertebrates:
55 mg/L

Additional information

Four freshwater studies with invertebrates (3 studies with D. magna, 1 study with D. galeata) are available. While the three studies with D. magna show an EC50 (48h) of about 100 mg/L, an EC50 (48h) of 15.8 mg/L with D. galeata has been observed. The difference in the sensitivity of the species is mostly likely due to the smaller size of D. galeata.

Although the publication has shown some deficiencies in reporting the publication has been selected for the chemical safety assessment as it also has been performed according to the OECD 202 test guideline and the parallel test with D. magna has shown an analogue effect value like the studies from the GLP laboratories indicating a comparable quality standard of the laboratories.

Effects in marine invertebrates has been examined in a study according to ISO/CD 14669 with Tolyltriazole using Acartia Tonsa showing an effect concentration EC50 (48h) = 55 mg/L.