Registration Dossier
Registration Dossier
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EC number: 242-582-0 | CAS number: 18794-84-8
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The effect of the test item on the growth of Pseudokirchneriella subcapitata (freshwater algae) has been investigated over a 72-Hour period and gave the following results (all results in v/v%):
ErC50 (0-72 h) >100% v/v saturated solution
EyC50 (0-72 h) >100% v/v saturated solution
No Observed Effect Concentration based on growth rate: 32% v/v saturated solution
No Observed Effect Concentration based on yield: 32% v/v saturated solution
Lowest Observed effect Concentration based on growth rate: 100% v/v saturated solution
Lowest Observed effect Concentration based on yield: 100% v/v saturated solution
At the limit of solubility there was a small effect on both growth and yield of freshwater algae
Analysis of saturated solution confirmed that the concentration of farnesene present was < LOQ, determined to be 0.13 μg/L.
Key value for chemical safety assessment
Additional information
Farnesene is poorly soluble in water so in a study to investigate the effects of farnesene on freshwater algae, organisms were exposed to dilutions of a saturated solution. Analysis of saturated solution confirmed that the concentration of farnesene present was < LOQ, determined to be 0.13 μg/L.
Results obtained (expressed as % of saturation), are as follows:
ErC50 (0-72 h) >100% v/v saturated solution
EyC50 (0-72 h) >100% v/v saturated solution
No Observed Effect Concentration based on growth rate: 32% v/v saturated solution
No Observed Effect Concentration based on yield: 32% v/v saturated solution
Lowest Observed effect Concentration based on growth rate: 100% v/v saturated solution
Lowest Observed effect Concentration based on yield: 100% v/v saturated solution
These results suggest that at the limit of solubility there is an effect on both growth and yield of algae.
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