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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

With high probability acutely not harmful to fish.

Key value for chemical safety assessment

LC50 for freshwater fish:
190 mg/L

Additional information

Experimental data on the acute toxicity of CAS 693 -98 -1 to fish are available. In the key study with Leuciscus idus the 96 -h LC50 value of the test substance was determined to be 190 mg/L (nominal, BASF AG, rep. no.: 10F0055/895102, 1989)). The static study was conducted according to DIN 38 412. 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).

This value is supported by Brooke L.T. et. al (1984). In a static short-term toxicity study according to the standard methods for  the examination of water and wastewater (published, Am. Publ. Health Assoc. APHA, 15th ed.) the 96 -h LC50 value was determined to be 286 mg/L (analytically verified). The test was performed using Pimephales promelas as test species.

Therefore, based on the available experimental data the test substance is considered with high probability acutely not harmful to fish.