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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

With high probability acutely not harmful to aquatic algae.

Key value for chemical safety assessment

EC50 for freshwater algae:
256.3 mg/L
EC10 or NOEC for freshwater algae:
109.8 mg/L

Additional information

Experimental data on the acute toxicity of CAS 693 -98 -1 to aquatic algae are available. 

The acute toxicity of the test substance on Desmodesmus subspicatus was studied according to DIN 38 412/9. The test was performed under static conditions. The 72-h EC10 value on the growth rate of the organisms was determined to be about 109.8 mg/L and the 72-h EC50 value on the growth rate was found to be ca. 256.3 mg/L (nominal, Ökolimna 02/90/231, 1990).

In this test the test concentrations were not analytically verified. However, the substance is assumed to be stable due to the substances' high water solubility (2.67e+05 mg/L, BASF SE, rep. no.: 11L00195, 2012), its low potential to evaporate based on its low vapor pressure (VP = 0.078 Pa, BASF SE, rep. no.: 11L00195, 2012) and its low Henry's Law Constant (HLC = 0.42 Pa m³/mol, calculated with the EPI Suite v4.11, BASF SE 2019). Moreover, the substance is not expected to adsorb based on its low log Kow and the calculated low log Koc values (see IUCLID Ch. 5.4.1).

The test substance is considered with high probability acutely not harmful to aquatic algae.