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Short-term toxicity to aquatic invertebrates

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Description of key information

The substance is with high probability acutely not harmful to aquatic invertebrates.

Key value for chemical safety assessment

Additional information

The acute toxicity of propanoic acid, 2,2-dimethyl- (CAS 75-98-9) to aquatic invertebrates was investigated in a static test conducted equivalently to OECD 202 using D. magna as test organism (MOE, Japan, 2011). The highest test concentration level of 100 mg/L was additionally tested ph-adjusted in order to exclude pH-based effects. The 48-h EC50 was determined to be >100 mg/L (nominal, analytically verified; pH-adjusted) as no mortality was observed within the exposure period of 48-h at the highest test concentration of 100 mg/L (48-h NOEC = 100 mg/L; nominal, analytically verified; pH-adjusted). In unbuffered test solutions, the 48-h EC50 was determined to be 87.4 mg/L; however, these effects were concluded to be due to pH. Therefore, the data for the buffered solutions were selected as key data in terms of the chemical safety assessment.

  

In conclusion, propanoic acid, 2,2-dimethyl- (CAS 75-98-9) is assessed to be with high probability acutely not harmful to aquatic invertebrates.