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EC number: 695-977-9 | CAS number: 1309955-79-0
In order to classify a standard laboratory toxicity study as valid, it is of particular importance that - besides information on test substance, test method / conditions and test organism used - suitable precautions are taken to prevent the loss of test substance by adsorption and that exposure concentrations are based upon measured levels.
For ecotoxicity tests performed using the bulk approach, however, adsorption to suspended matter and DOC is acceptable and only adsorption to glassware should be accounted. Biodegradation will be negligible in the short exposure interval.
For a valid bulk approach test the concentration-effect relationship should be based on the sum of adsorbed and dissolved substance in the volume of the medium tested. One of the advantages of bulk approach tests with these difficult substances is that in the presence of suspended matter and humic acids, the test solutions are stabilized and residual sorption to glassware will be negligible. The results of these bulk approach tests are therefore much easier to interpret, more environmental realistic, and if compared to PECbulkclearly provide a more appropriate assessment of risks for the environment. All effect values given are therefore based on the nominal test item concentrations. The PNECaquatic bulk is calculated using the default assessment factor as proposed by the REACH guidance.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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