Registration Dossier
Registration Dossier
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EC number: 201-126-0 | CAS number: 78-59-1
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The substance is with high probability acutely not harmful to algae.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 475 mg/L
- EC10 or NOEC for freshwater algae:
- 64 mg/L
Additional information
Experimental data are available for the assessment of the short-term toxicity of isophorone to aquatic algae. In the study performed by Huels AG (1996) the substance was tested in a static test, conducted according to OECD 201. Desmodesmus subspicatus ws used as a test organism. The 72-h EbC50 was determined to be 475 mg/L and EbC10 was 64 mg/L (nominal, biomass, 1996). No analytical measurement was performed during the study.
Additionally, under supervision of the Japanese Ministry of the Environment a study according to OECD 201 (1984) was conducted under GLP and publishe. The test species was Pseudokirchneriella subcapitata. The 72-h ErC50 was determined to be 205.2 mg/L (nominal, growth rate, NITE, 2020). The test concentrations were analytically verified.
Therefore, it can be concluded, that the substance is with high probability acutely not harmful to algae.
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