Registration Dossier
Registration Dossier
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EC number: 416-210-4 | CAS number: 128119-70-0
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
A study according to OECD 209 was performed to assess the inhibitory effect of Bornafix on the respiration of activated sewage sludge. Cultures of activated sewage sludge were incubated with synthetic sewage under vigorous aeration and in the presence of the test substance. Aeration was interrupted after 30 minutes and again after 3 hours and the rates of respiration measured electrochemically for each culture. The percentage inhibition of respiration was calculated for each culture after each contact period by comparing oxygen depletion rates for the test substance with those for the negative control culture. A positive control i.e. 3,5-dichlorophenol was tested concurrently with the test substance in order to demonstrate the satisfactory performance of the procedure. The EC50 (respiration inhibition) values for Bornafix have been determined as > 100 mg/l for the 30- minute contact time and > 100 mg/l for the 3-hour contact time. The NOEC is considered to be 18 mg/l, which will be used for the risk characterisation.
Key value for chemical safety assessment
- EC10 or NOEC for microorganisms:
- 18 mg/L
Additional information
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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