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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

The tests with fish resulted in acute LC50 values and toxic/lethal concentrations ranging from 35 to 189 mg/L. 

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Additional information

The OECD SIDS (2002) assigned a low code of reliability ('invalid' or 'not assignable') to all available tests, as in general the tests were not conducted according to the current test guidelines (EU RAR, 2007; section 3.2.1.1.4, page 30). Furthermore, in many tests reports there were no data on pH, buffer capacity and/or test medium composition, although this is essential information for toxicity tests with NaOH. This is the most important reason why most of the tests were considered 'invalid'. Despite of this, there is no need for additional aquatic toxicity testing with NaOH, as all available tests resulted in a rather small range of toxicity values (acute toxicity tests to fish: 35 to 189 mg/L) and there are sufficient data on the pH ranges that are tolerated by major taxonomic groups.