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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Methyl acrylate is readily biodegradable according to OECD criteria.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

In a CO2-Headspace test according to ISO 14593 which is identical to OECD 310 (Ready Biodegradability - CO2 in sealed vessels) methyl acrylate was readily biodegradable. The inoculum used in this study was domestic activated sludge from a laboratory wastewater treatment plant fed with municipal sewage. The assay was conducted at a test substance concentration of 35 mg/L equivalent to 20 mg/L TOC at 22 °C in the dark. After 28 days a biodegradation degree of 90 - 100 % (TIC/ThIC) was determined. The 10-day-window criterion for ready biodegradability was fulfilled (BAMM 2005).

Methyl acrylate was tested in a closed bottle test performed in accordance with OECD guideline 301D, attaining 50 - 60 % BOD of ThOD within 28 days (BAMM 1996). It was significantly degraded (> 30 % within 14 days) in a MITI test with a mixed inoculum of soil, surface water and sewage (Sasaki 1978).

Based on the presented test results, methyl acrylate is considered to be readily biodegradable.