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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

ErC50 (72 h, D. subspicatus) > 100 mg/L (nominal)

NOEC (72 h, D. subspicatus) = 100 mg/L (nominal)

Key value for chemical safety assessment

EC10 or NOEC for freshwater algae:
100 mg/L

Additional information

Based on REACH regulation ANNEX VIII column II, a study on the toxicity of a substance to aquatic algae and cyanobacteria does not need to be conducted if it is readily biodegradable and its water solubility is below 1 mg/L at 25 °C. Ester B is considered readily biodegradable and has a water solubility value of 0.37 mg/L at 25 °C, therefore, it is not expected to be toxic to aquatic algae. An algal growth inhibition test was performed on Desmodesmus subspicatus according to the OECD Guideline 201 (2011) which supported this prediction. The test item did not significantly inhibit the growth rate or yield of D. subspicatus following a 72-hour exposure up to its solubility limit; therefore, the ErC50 and EyC50 values were determined to be greater than 100 mg/L, and the NOEC is at least 100 mg/L, based on nominal concentrations.

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