Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

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Additional information

No data on terrestrial toxicity are available for sodium acrylate; therefore, results from investigations on the structural analogous substance acrylic acid were taken into account for the assessment of terrestrial toxicity of sodium acrylate.

 

An acute earthworm toxicity study was conducted in Eisenia foetida foetida according to the EU method 88/302/EEC, C.8 and in compliance with GLP regulations (Huels AG, 1995). Groups of ten earthworms per replicate (4 replicates/treatment group) were exposed to 1000 mg acrylic acid/kg dry weight in an artificial soil (limit test). A control was run in parallel. Mortality was recorded after 7 and 14 days. All test animals survived the treatment until test termination. Thus, the LC50 was determined to be greater than 1000 mg/kg dry weight.

 

A study on the toxicity of a range of concentrations of acrylic acid towards soil micro-flora was conducted according to a draft version of OECD TG 217. Concentrations of acrylic acid up to 100 ppm were non-toxic to the soil micro-flora, while a concentration of 1000 ppm was highly toxic and depressed respiration rates of soil micro-flora completely. Thus, the EC0 for soil micro-flora based on effects on carbon cycle was determined to be 100 ppm (= 100 mg/kg soil ww).

 

Since acrylic acid is readily biodegradable and no direct releases to soil from point sources are known, no significant exposure of the terrestrial compartment is expected. At production sites acrylates are handled in closed systems for polymerisation. Diffuse releases into the environment may occur from residual monomers in the polymeric products. No further testing in the terrestrial compartment is required based on such low exposure levels.