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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The calculated 96 hr EC50 values for representative substances within  this Category  showed a short term toxicity to aquatic algae and cyanobacteria to be in the range 7.7 - 8.6 mg/l

Key value for chemical safety assessment

Additional information

Members of this category are gases at standard temperature and pressure, therefore conducting an aquatic ecotoxicity test is technically difficult and based on exposure estimates the test may not be relevant. In addition, it is difficult to assess the toxicity of UVCB streams using standard test methods. Instead, it is more appropriate to consider the toxicity of representative components of these streams.

Therefore, the use of a QSAR to predict the ecotoxicity of representative components of these streams is an appropriate technique to use as part of a weight of evidence approach. The use of ECOSAR is appropriate for this Category as these streams falls within the applicability domain of the model.