Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

No data are available. Waivers are proposed for terrestrial toxicity endpoints based on exposure considerations.

Acrylonitrile can potentially be redistributed to soil from the atmospheric or aqueous compartments, by the spreading of acrylonitrile-contaminated sewage sludge or as a result of accidental spills. Acrylonitrile is anticipated to be relatively mobile in soil, and this was supported by the results of an adsorption:desorption study of acrylonitrile, which provides no evidence of adsorption, the adsorption:desorption processes being in equilibrium. This is supported by calculation of the Koc (soil adsorption coefficient) using QSAR and from the water solubility of acrylonitrile when values of 11.5 and 9.0, respectively were derived, showing little potential for adsorption to soil. Industrial sludge from acrylonitrile production and processing facilities is not spread on land in Europe; contaminated sludge is incinerated. The main source of release of acrylonitrile to soil will therefore be deposition from the atmospheric compartment. Acrylonitrile entering the terrestrial compartment in small quantities will be rapidly degraded by photolysis. Any run-off from the soil will be released to groundwater, where acrylonitrile will also undergo biodegradation. The above considerations would therefore indicate that levels of acrylonitrile in soil are likely to be extremely low.

Additional information