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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Key study, Pseudokirchnerella subcapitata, 48 h; EC > 100 mg/L (GLP, OECD 201 guideline study, TUEV SUED, 2012)

Key value for chemical safety assessment

EC50 for freshwater algae:
100 mg/L

Additional information

In order to assess the toxicity to aquatic algae of the test substance barium titanium trioxide (purity: > 99 weight-%), the test in Pseudokirchnerella subcapitata was performed according to the method described in OECD guideline 201 (TÜV SÜD PSB, 2012). A limit test with a concentration of 100 mg/L of the test substance was carried out with an exposure duration of 48 hours.

The EC50 for growth rate was estimated to be higher than 100 mg/L as no inhibition effect on the growth of the algae used for the test was observed.


From the above study, the test item Barium titanate milled ABT-O-21 has passed the limit test. At a concentration of 100 mg/L the test substance had no inhibition effect on the growth of the algae used for the test. The EC50 of the test substance is higher than 100 mg/L.