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Short-term toxicity to aquatic invertebrates

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Description of key information

Acrylic acid is acutely harmful to freshwater and saltwater invertebrates.
EC50 (48 h) = 95 mg/L (measured), (Daphnia magna, EPA OTS 797.1300, flow through)
EC50 (48 h) = 47 mg/L (nominal), (Daphnia magna, 92/69/EEC C2, static)
LC50 (96 h) = 97 mg/L (measured), (Mysidopsis bahia, EPA OTS 797.1930, flow through)

Key value for chemical safety assessment

Additional information

An acute toxicity study with Daphnia magna (BAMM, 1990) indicated the 48-hour EC50 was 95 mg/L based on mean measured concentrations. This study followed EPA OTS Guideline 797.1300 using a flow-through design. Nominal exposure concentrations ranged from 7.2 to 120 mg/L and mean measured concentrations ranged from 7.9 to 110 mg/L. The NOEC was 23 mg/L (measured).

In addition, there is a short-term test with Daphnia magna conducted according to 92/69/EEC C2 using static test conditions. Analytical concentration control by spectrophotometrical measurements revealed a recovery rate of > 80 %. Therefore effect values were based on nominal concentrations. The 48-hr EC50 was found to be 47 mg/L (Huels AG 1995).

 

In a toxicity study with the seawater invertebrate Mysidopsis bahia (BAMM, 1996) an 96-hr LC50 of 97 mg/L based on mean measured concentrations was determined. This study was conducted according to the procedures in Title 40 of the Code of Federal Regulations, Part 797, Section 1930, Mysid Shrimp Acute Toxicity Test, using a flow-through design. Nominal exposure concentrations ranged from 26 to 200 mg/L and mean measured concentrations ranged from 30 to 239 mg/L.The LC0 and NOEC were considered to be 48 mg/L (mean measured).