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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

The 48-h EC50 value for monoethanolamine in Daphnia magna is 65 mg/L, after correction for molecular weight an effect concentration of 366 mg/L for monoethanolamine oleate will be used in the assessment.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
366

Additional information

No short-term studies with invertebrates are available for monoethanolamine oleate. A GLP-compliant Directive 92/69/EEC, C.2. guideline study with Daphnia magna is available for one of its starting materials, monoethanolamine (Huels, 1997). Monoethanolamine oleate is the salt of monoethanolamine and oleic acid. As oleic acid is exempted for registration according to Annex V of REACH Directive 2006/121/EC, the focus is only on the monoethanolammmonium cation of monoethanolamine oleate (for more details see reporting format for the analogue approach in Appendix).

Daphnids (20/dose) were exposed to nominal concentrations of 3 to 1000 mg/L under semi-static conditions for 48 hours, the test concentrations were analytically verified and were within 80% of nominal concentrations. The 48-h EC50 value is 65 mg/L (based on nominal concentrations), a safety factor need not to be applied to this value. Instead, the effect concentration will be corrected for molecular weight. An effect concentration of 366 mg/L for monoethanolamine oleate will be used in the assessment.