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Short-term toxicity to fish

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Description of key information

The short-term toxicity of TCPP toward fish (Pimephales promelas) was investigated in a static bioassay yielding a 96h-LC50 of 51 mg/l. The effect concentration refers to measured concentrations. (Meeks, 1985)

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
51 mg/L

Additional information

There are several tests on toxicity to fish towards different species available. The most sensitive species is Pimephales promelas, resulting in the lowest effect concentration of 51 mg/l. Analytical monitoring was performed, and the result relates to measured concentrations as the recovery rate was in the range between 32% and 93%. The increasing recovery rate over test duration may be based on incomplete mixing of TCPP in the test vessels at test start. The test substance was directly weighed into the test vessels and vigorously stirred afterwards with a glass rod. At test end the recovery rates shows that the test substance was completely mixed. The results on analytical monitoring obtained in the toxicity test towards Danio rerio show stability of TCPP during the test. TCPP was directly weighed into the test vessels, but treated with an ultra turrax for 60 seconds. The recovery rates at the beginning of the test ranged from 91 % to 94 % showing already complete mixing at test start. The result obtained for Pimephales promelas is considered to be reliable, as it is in good agreement with the result determined for Danio rerio.