Registration Dossier
Registration Dossier
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EC number: 200-753-7 | CAS number: 71-43-2
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The 72 hour EC50 is 100 mg/L and the 72 hour NOEC is 34 mg/L based on growth rate of Selenastrum capricornutum.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 100 mg/L
- EC10 or NOEC for freshwater algae:
- 34 mg/L
Additional information
Two algal studies are available which report results after 72 hours exposure. Both studies used Selenastrum capricornutum in standard OECD 201 studies using closed systems and the effect values are based on measured concentrations. Following the same approach as set out in the EU RAR (2008), as Galassi et al. (1988) only derive an EC50 value with no information available on the no effect level, the results found by TNO (2001) will be used for the further effects assessment. As TNO (2001) reports both EC50 and NOEC, it is used as the key study and this study was also identified as the key study for algal toxicity in the EU RAR for benzene (2008).
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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