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EC number: 939-526-9 | CAS number: 90506-73-3
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The 72 h NOEC and 72 h EC50 values of Phosphoric acid, mono- and di- C16-18 (even numbered) alkyl esters in freshwater algae based on growth rate as well as on biomass yield were 200 and >200 mg/L, respectively.
Key value for chemical safety assessment
Additional information
In a 72 hour acute toxicity study, the cultures of Pseudokirchnerella subcapitata strain 61.81 SAG were exposed to Phosphoric acid, mono- and di- C16-18 (even numbered) alkyl esters (100%) at nominal loading rates of 0.0, 2.0, 6.3, 20, 63 and 200 mg/L under static conditions in accordance with the OECD guideline 201 (2006) and EU method C.3 (2008). Since a water accommodated fraction of the test item was tested, the reported biological results were based on the loading rate of the test item.
The microscopic examination of the algal cells at the end of the test showed no abnormalities. The test item had no statistically significant inhibitory effect on the growth of the algae (average growth rate and yield) during the test period of 72 hours up to and including the highest loading rate of 200 mg/L.
The 72 h NOEC based on growth rate as well as on biomass was 200 mg/L. The 72 h EC10 and EC50 based on growth rate as well as on biomass were >200 mg/L.
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