Registration Dossier
Registration Dossier
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EC number: 203-475-4 | CAS number: 107-25-5
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The substance is acutely harmful to algae.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 45.9 mg/L
- EC10 or NOEC for freshwater algae:
- 9.82 mg/L
Additional information
In a 72-hour static GLP test with the green alga Scenedesmus subspicatus (new name: Desmodesmus subspicatus) according to OECD guideline 201, the algal toxicity of the analogous substance isobutyl vinyl ether was investigated (BASF 2004).
The read-across is suitable because the substance has te same functional groups and a comparable moelcular structure and size, according to SIDS Initial Assessment Profile 23, 17-20 October 2006.
Statistical evaluation of the endpoint growth rate revealed an EC50 (72h) of 45.9 mg/L, the NOEC was calculated to be 9.82 mg/L, both related to the mean of the analytically determined concentrations.
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