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Diss Factsheets

Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

Description of key information

Acute toxicity against aquatic invertebrates Key  study:  Tadokoro  1997,  daphnia  magna  (more  frequently  used  than Mysidopsis bahia, better comparability with other chemicals).

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
12.5 mg/L

Marine water invertebrates

Marine water invertebrates
Effect concentration:
18.3 mg/L

Additional information

The short-term results show that TDI has low to moderate acute toxicity to freshwater and marine invertebrates. It is highly probable that TDI disappeared from the media soon after addition to water and it is likely that any measured toxic effects were due to the presence of hydrolysis products. In the above studies, where TDA was formed and measured, it should be noted that the concentration levels at the endpoint (5-10 mg/l) are similar to the 24h and 48h LC50 values reported for TDA with invertebrates. Due to the quality of the study and relevance of the organism, the EC50 value of 12.5 mg/L detected for Daphnia magna by Tadokoro et al (1997) is regarded as being the most relevant data point for assessing the acute toxicity of TDI against aquatic invertebrates.