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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

96 h LC50 >100 mg a.i./L (OECD TG 203; Danio rerio; semi-static, natural river water containing 3.46 mg/L TOC (2.71 mg/L DOC)) RL1; GLP

Key value for chemical safety assessment

LC50 for freshwater fish:
100 mg/L

Additional information

In a 96 h acute toxicity study according to OECD guideline 203, adopted 17 July 1992, zebrafish (Danio rerio) were exposed to Undecylenamidopropyl Betaine at nominal concentrations of 0 (control) and 100 mg a.i./L under semi-static conditions in natural river water containing 3.46 mg/L TOC (2.71 mg/L DOC). Measured test item concentrations were in agreement with nominal (93-102%). These concentrations remained stable during both renewal periods. Given these results, effect parameters can be based on the nominal test concentrations.

No mortality or other clinical effect was observed at the limit concentration and the control during the 96-hour test period. The 96 h LC50 was >100 mg a.i./L.