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Long-term toxicity to aquatic invertebrates

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Description of key information

Long term effects to Aquatic invertebrates are discussed.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
0.1 mg/L

Additional information

A study was performed to assess the effects of tris(methylphenyl) phosphate on the reproductive output of parthenogenetic Daphnia magna under semi-static conditions. The study was conducted in accordance with the national standard method NEN 6502 (1980): Determination of the chronic toxicity with Daphnia magna. Young female Daphnia, aged less than 24 hours at the start of the test, were exposed to various concentrations. After a 21d-exposure period, the total number of offspring produced per parent animal at the end of the test was assessed. The reproductive output of the Daphnia exposed to the substance was compared to that of the control in order to determine the No Observed Effect Concentration (NOEC). A NOEC of 0.1 mg/l was obtained, expressed in terms of measured concentrations. This toxicity study is classified as acceptable and satisfies generally accepted scientific standards for the long-term toxicity test.

A NOEC for long term fish toxicity is assigned as 0. 1 mg/l

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