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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

According to the OECD Guideline for Testing of Chemicals No. 201, no toxic effects against algae were observed at a limit test concentration of 100 mg/L (active ingredient) under exposure conditions. Based on growth rate for naphthalene-1,5-disulfonic acid an 72h-EC50 of > 100 mg/L and a72 h-NOEC of >= 100 mg/L was observed.

The results are expressed in terms of nominal concentrations. Effective concentrations ranged from 99.9 % to 100.8 % of nominal values of the active ingredient at 0 hours, and from 98.4 % to 101.3 % of nominal values of the active ingredient at 72 hours.

Key value for chemical safety assessment

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

Additional information

The given results were:

72h-EC50 >100 mg/L

72h-EC10 >100 mg/L

72h-NOEC >= 100 mg/L

72h-LOEC > 100mg/L