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Ecotoxicity/toxicity

Cedre performs ecotoxicity tests in order to quantify the levels of contamination to which organisms are exposed.

In 2011, Cedre added an original facility to its range of experimental equipment: the ecotoxicology test bench. In addition to routine tests performed to assess the toxicity of dispersants or washing agents, this system can be used to study the toxicity of a larger range of products and mixtures on a wider variety of organisms, in particular marine organisms, positioned at different levels in the food chain (from copepods to juvenile fish).

We can therefore respond to requests from industrial firms which are required under European REACH regulations to assess the risks of the chemicals they sell.

The assessment of a substance's toxicity is based on the determination of its lethal concentration or LC50, i.e. the concentration which will kill 50% of individuals tested.

In terms of toxicity assessments, Cedre performs the different tests listed below:

  • determination of a substance's acute toxicity (French standard NF T90-349)
  • determination of a substance's lethal toxicity on marine copepods (standard FD ISO 14669)
  • growth inhibition trial on marine algae with Skeletonema costatum and Phaeodactylum tricornutum (NF EN ISO 10253)
  • fish, acute toxicity test (standard: Guideline 203 of the OECD Guidelines for the Testing of Chemicals, amended by OSPAR)
  • determination of the acute toxicity of sediments on amphipods Corophium sp. (standard: OSPAR, Protocols on methods for the testing of chemicals used in the offshore oil industry)
  • toxicity test in freshwater (French standard NF T90-303) (standard: OSPAR, Protocols on methods for the testing of chemicals used in the offshore oil industry).