Registration Dossier
Registration Dossier
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EC number: 246-922-9 | CAS number: 25378-22-7
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Based on read across the 72 hour EC50 is 0.25-0.5mg/l.
Key value for chemical safety assessment
Additional information
The toxicity of dodec-1-ene toPseudokirchneriella subcapitatawas investigated in an OECD 201 test (Brixham Environmental Laboratories, 2010). Due to the low solubility of the test substance the study used a solvent carrier. The test substance was mixed with the solvent before being added to the dilution water. It was then stirred for 48 hours under sealed conditions to maximise the exposure concentrations. The test was carried out in sealed test vessels to minimise the loss of the test substance.
At the lower loading rates (0.032 - 0.25 mg/l) the measured concentrations were below the limit of detection (0.01 mg/l) throughout the test. No effects were seen at these loading rates. A 96% effect was observed at 0.5 mg/l, the next highest loading rate and a similar level of effect was also observed at the 1 and 2 mg/l loading rates. Exposure concentrations at the 0.5 mg/l loading rate were at the limit of detection at the start of the exposure and had dropped below the limit of detection after 72 hours. An EC50 has therefore not been calculated. Instead the results based on loading rate are a 72 EC50 of 0.25 - 0.5 mg/l and are interpreted as indicating effects below the limit of solubility.These data are read across to dodecene.
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