Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Adsorption/Desorption

Adsorption to solid soil phase is not expected. For tert-butyl acrylate log Koc values for the uncharged molecule were calculated to be 138.9 L/kg (log Koc = 2.1428) and 23.14 L/kg (log Koc = 1.3643)

when based on the log Kow method and the MCI method, respectively.

Henry's law constant

For the substance tert-butyl acrylate the Henry's law constant was calculated to be 21.9 Pa·m³/mole based on the Bond Contribution Method, indicating slow evaporation of the substance from the water surface into the atmosphere.

Distribution modelling

Distribution modeling using Mackay Level I indicates that tert-butyl acrylate is likely to partition to the air compartment (97.8%) with the remainder partitioning into water (2.1%); negligible amounts are predicted to occur in other environmental compartments (soil, sediment) (Level I Fugacity, 2017).

Based on the physical chemical properties of tert-butyl acrylate, the atmosphere is the main target compartment for distribution and only small amounts will remain in the hydrosphere and geosphere.

Additional information