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Environmental fate & pathways

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A Mackay level III distribution was calculated using the EPI Suite™ ver. 4.10 (US-EPA, 2008) for releases of the methacrylate esters to air and water, but not soil, because there are no direct emissions to soil. The Mackay III calculations result in the following theoretical partitioning into the standard compartments.

Mackay level III Calculation (Evonik, 2013)

 

Substance

Air

(%)

Water

(%)

Soil

(%)

Sediment

(%)

Release to air

EGDMA

42.7

13.5

43.8

0.0

 

Substance

Air

(%)

Water

(%)

Soil

(%)

Sediment

(%)

Release to water

EGDMA

0.0

99.7

0.0

 0.3

When released to air, EGDMA preferentially partitions to soil and to a lesser degree to water, but also maintains a significant presence in air. Partitioning to sediment is low.When released to water all EGDMA tends to stay in the compartment where it was released.

EGDMA has a low vapour pressure and a high water solubility and consequently a low Henry constant. Epiwin model calculations indicate a low volatilisation potential.