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EC number: 248-130-9
CAS number: 26952-13-6
Based on read across, alkenes C11/13/14 are not expected to be acutely toxic to fish at their limit of solubility.
Davi (1996) tested the acute toxicity of alkenes, C10 -14 branched and
linear, C12 rich to Oncorhynchus mykiss in an OECD 203 test. The test
concentration was expressed as a loading rate due to the low solubility
of the test substance. No mortality was observed at the highest loading
rate, so the LL50 was above the loading rate of 86mg/l WAF.
The toxicity of dodec-1 -ene to fish was investigated in an OECD 203
test with Oncorhynchus mykiss (Brixham Environmental Laboratories,
2010). Due to the low solubility of the test substance (0.12mg/l) the
study was conducted as a limit test and 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 with
sealed test vessels and the solutions were renewed daily to minimise the
loss of the test substance. Measured concentrations remained above the
solubility of the test substance throughout the exposure period
(measured range 0.76 -1.5 mg/l) except during the final 24 hour period
when concentrations fell from 1.1 to 0.049mg/l following the final
solution renewal. After
96 hours there were no mortalities in the blank control, solvent control
or single exposure concentration. These results are interpreted as
demonstrating that the 72 hour LC50 of dodec-1 -ene is above its limit
of solubility. Due to the drop in exposure concentrations over the final
24 hours the 96 hour LC50 is not used in the assessment.
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