Registration Dossier
Registration Dossier
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EC number: 231-569-5 | CAS number: 7637-07-2
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
Short-term studies of the aquatic tubificid worm showed no mortality at 85 to 1313 mg-B/L (Mann, 1973). Studies of the midge Chironomous decorus showed a 2-day EC50 of 1376 mg-B/L (Maier & Knight, 1991). As noted above, a NOEC of 10 mg-B/L was reported for C. decorus (Maier & Knight) but the study system did not include any sediment.
Key value for chemical safety assessment
Additional information
Limited data on sediment organisms are available. Short-term studies of the aquatic tubificid worm showed no mortality at 85 to 1313 mg-B/L (Mann, 1973). Studies of the midge Chironomous decorus showed a 2-day EC50 of 1376 mg-B/L (Maier & Knight, 1991). As noted above, a NOEC of 10 mg-B/L was reported for C. decorus (Maier & Knight) but the study system did not include any sediment.
The single guideline study using spiked sediments showed a NOEC for growth and emergence of 180 mg-B/L for the midge Chironomous ripariusin a 28 day test (Hooftman et al. 2000b).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.
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