Registration Dossier
Registration Dossier
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EC number: 423-740-1 | CAS number: 10461-98-0
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
In aquatic algae toxicity study for 72 hrs. on Scenedesmus capricornutum species the effective concentration was found to as followed:
EC50=0.86 mg/L (72 h) at biomass effect
EC50=1.96 mg/L (72 h) at growth rate effect
NOEC=0.5 mg/L(72 h) at growth rate effect
NOEC=0.5 mg/L(72 h) at biomass effect
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 1.96 mg/L
Additional information
In aquatic algae toxicity study for 72 hrs. on Scenedesmus capricornutum species the effective concentration was found to as followed:
EC50=0.86 mg/L (72 h) at biomass effect
EC50=1.96 mg/L (72 h) at growth rate effect
NOEC=0.5 mg/L(72 h) at growth rate effect
NOEC=0.5 mg/L(72 h) at biomass effect
All experimental values indicate that the test substance2-cyclohexylidene-2-phenylacetonitrile was categorized in aquatic category 1 and 2 as per the CLP criteria.
Supporting study from predicted model (ECOSAR v1.1 )indicate that the Effect concentration (EC50) for the test compound 2-cyclohexylidene-2-phenylacetonitrile in a 96h study using green algae is 1.771 mg/L.
This EC50 values indicate that the test substance is toxic to aquatic environment and catogerized in aquatic chronic 2 as per the CLP criteria.
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