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EC number: 422-210-5 | CAS number: 68957-94-8 T3P
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The test item was examined for acute toxicity to aquatic algea in a 72-h static test according to OECD Guideline 201 and EU method C.3. The test item caused no reduction in growth rate or biomass up to a nominal concentration of 100 mg/L. Thus, the 72-h LC50 was determined to be greater than 100 mg/L and the 72-h NOEC was determined to be 100 mg/L.
Key value for chemical safety assessment
- EC10 or NOEC for freshwater algae:
- 100 mg/L
Additional information
The acute toxicity of the test item to aquatic algae (Scenedesmus subspicatus) was determined according to the OECD Guideline 201 and EU method C.3.
A static test was performed as a limit test with a concentration of 100 mg/L. 1000 cells/mL were exposed to the test concentration and the control, respectively. Growth rate and biomass were determined after 24, 48 and 72 hours. The test substance undergoes fast hydrolysis in water with subsequent temperature and pH-dependent changes in the composition of the hydrolysis products. An analytical determination of the test compound or of the hydrolysis products in the test batches was not possible, because the composition of the test water disturbs the analysis by paramagnetic effects.
Test organisms exposed to 100 mg/L of the test item showed no reduction in growth rate or biomass. Thus, the 72-h LC50 was determined to be greater than 100 mg/L and the 72-h NOEC was determined to be 100 mg/L.
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