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Short-term toxicity to aquatic invertebrates

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Description of key information

48 h EC50 >100 mg a.i./L (OECD TG 202; Daphnia magna; static, natural river water containing 3.46 mg/L TOC (2.71 mg/L DOC)); RL1; GLP

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
100 mg/L

Additional information

The 48-hr-acute toxicity of Undecylenamidopropyl Betaine to  Daphnia magna was studied under static conditions according to OECD Guideline 202 (2004).  In this limit test, daphnids were exposed to control and test chemical at a nominal concentration of 100 mg a.i./L in natural river water containing 3.46 mg/L TOC (2.71 mg/L DOC) for 48 h. Mortality/immobilization was observed daily. 

Measured test item concentrations were in agreement with nominal (100-103%). 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 test period. The 48-hour EC50 was >100 mg a.i./L