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Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Description of key information

The long-term toxicity of 1 -chloro-2 -methylbenzene towards aquatic invertebrates was investigated following a preliminary guideline proposal of the German Federal Environmental Agency. Daphnia magna was used as test organism yielding a 21-day NOEC of 0.14 mg/l with reproduction as most sensitive endpoint (Kühn, 1988). The NOEC refers to analytically determined values.

Key value for chemical safety assessment

EC10, LC10 or NOEC for freshwater invertebrates:
0.14 mg/L

Additional information

Due to analytical problems with the low dosis ranges at that time (determination limit 10 mg/l), a recovery rate of 50 % after 48 h was determined at a test concentration of 80 mg/l. 
Thus the authors calculated the NOEC based on the recovery rate of 50 %.