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Short-term toxicity to aquatic invertebrates

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Description of key information

Acutely harmful to aquatic invertebrates.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
27 mg/L

Additional information

The acute toxicity to aquatic invertebrates was tested in several studies. The key study investigating the immobilisation of Daphnia magna was conducted according to OECD 202 and ASTME-729 (P&G, 2012). The study was conducted under GLP and with analytical monitoring. The 48 -h EC50 was determined to be 27.04 mg/L (geometric mean). This value indicates that 2 -aminoethanol is acutely harmful to aquatic invertebrates.

Further studies support this conclusion:

In an acute immobilization study according to EU method C.2 under static conditions with analytical monitoring the immobilization of Daphnia magna was investigated. The 48 -h EC50 was determined to be 65 mg/L (measured; Huels, 1997). In a semi-static Daphnia magna immobilisation test according to OECD 202 and under GLP with analytical monitoring, the 48 -h EC50 was 97.26 mg/L (nominal, analytically verified; NITE, 1997). In a further study with Daphnia magna, the 48 -h EC50 was determined to be 32.6 mg/L. However, the test was performed according to a lab procedure which was not further specified in the report. Information on test performance and analytical monitoring are lacking (UCC, 1988).

The effect of MEA on Daphnia magna was studied according to an Environment Canada method (PTAC, 2006). Neonates were exposed to a series of 5 test concentrations and observed over 48 h (mortality). The test concentrations were analytically verified. The 48-h LC50 was determined to be 66.7 mg/L (95% CL: 60.1 -74.1 mg/L; nominal).

 

Libralato et al. (2010) tested a saline species (Artemia franciscana). The 24 -h EC50 was determined to be 43 mg/L and is within the same range as the freshwater data for 2 -aminoethanol.

The effect of MEA on Hyalella azteca was studied according to an Environment Canada method (PTAC, 2006). 50 animals were exposed to a series of 5 test concentrations and observed over 96 h and dead neonates counted after 48 and 96 h. The test concentrations were analytically verified. The 96 -h LC50 was determined to be 170 mg/L (95% CL: 163 -177 mg/L; nominal).