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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

72-hour ErC50 for Pseudokirchneriella subcapitata is greater than 100 mg/L.  NOEC equal to or greater than 100 mg/L.

Key value for chemical safety assessment

EC50/LC50 for freshwater algae:
100 mg/L
EC10, LC10 or NOEC for freshwater algae:
100 mg/L

Additional information

An algal growth inhibition study was conducted to determine the effect of the test material on aquatic plants. The study was conducted in accordance with OECD test guideline 201, and in compliance with GLP.

The growth of the algae Pseudokirchneriella subcapitata in untreated aquatic growth medium over a 72 hour test period was compared to the growth of algae in medium containing the test material at a concentration of 100 mg/L. The test was conducted in six replicate vessels at each concentration.

No difference in growth rates was seen between the control group and 100 mg/L group. On this basis, the 72 hour EC50 based on growth rate (ErC50) was determined to be greater than 100 mg/L. The NOEC was 100 mg/L.