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Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Description of key information

The 21-d NOEC for MTBE in Daphnia magna is 51 mg/l, applying a safety factor of 10 results in a NOEC of 5.1 mg/l for ETBE. For marine invertebrates the 28-d NOEC for TAME is 3.39 mg/l in Americamysis bahia, applying a safety factor of 2 results in an NOEC of 1.7 mg/l for ETBE.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
5.1 mg/L

Marine water invertebrates

Marine water invertebrates
Effect concentration:
1.7 mg/L

Additional information

No chronic studies with invertebrates are available for ETBE, chronic studies are, however, available for MTBE and TAME. A guideline study is available for MTBE withDaphnia magna, the 21-d NOEC is 51 mg/l (Wildlife International Ltd. 1999). A safety factor of 10 is applied to this value, resulting in an effect concentration of 5.1 mg/l for ETBE. For marine invertebrates a chronic guideline study is available for TAME withAmericamysis bahia(T.R. Wilbury Laboratories, Inc., 2004). The 28-d NOEC is 3.39 mg/l, applying a safety factor of 2 results in an effect concentration of 1.7 mg/l for ETBE. These values are used in the assessment.