Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 287-476-5
CAS number: 85535-84-8
It was noted that the EC50 value was greater
than the maximum measured concentration tested since the test substance
caused the Daphnia magna to float, on or near the surface of the
solution, at measured concentrations of approximately 75 ug/L and above.
Table 2. Percentage of immobolised and floating
Daphnia at 24 and 48 h
Nominal concentration (ug/l)
Total number tested
In a well
reported, good quality study to GLP, the acute toxicity of Chlorowax
500C (a C10-12 chlorinated paraffin; 58% chlorination) to the freshwater
crustacean, Daphnia magna, was determined in a static system. Groups of
20 Daphnia, aged <24 h, were exposed to nominal concentrations of 0, 18,
32, 56, 100, 180, 320 or 560 µg/L for up to 48 h. The Daphnia were not
fed during the course of the test and immobilisation was assessed after
24 and 48 h.
The 48 h
EC50 for immobilisation to Daphnia magna was estimated, based on
measured concentrations, to be 530 µg/L (95% CL 355-1540 µg/L). This
value was in excess of the maximum measured concentration tested of 415
µg/L, since the test substance caused the Daphnia to float, on or near
the surface of the solution, at measured concentrations of approximately
75 µg/L and above.
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.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Do not show this message again