Registration Dossier
Registration Dossier
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EC number: 224-698-3 | CAS number: 4454-05-1
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
With high probability acutely not harmful to aquatic algae.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 165 mg/L
Additional information
In a non-GLP, 72-hour static test with the green alga Scenedesmus subspicatus according to Germna Industrial Standard DIN 38412 part 9, the algae toxicity of 3,4-dihydro-2-methoxy-2H-pyran was studied. Statistical evaluation of the endpoint growth rate resulted in an EC50 (72h) >500 mg/L, related to the nominal concentration. Due to the fact that the test substance volatizes rapidly,
an additional study was performed in 2003 to analytically quantify the amount of substance in the test vessels before and at the end of the test. After 96 hours a time-weighted average recovery rate between 0 and 72 hours of 33% was estimated. Based on these data, an EC50 (72h) >165 mg/L can be estimated.
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