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Environmental fate & pathways

Hydrolysis

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Description of key information

Experimental data supported by modeled values.

Key value for chemical safety assessment

Additional information

Hydrolysis studies were performed first using bis(2-ethylhexyl)terephthalate[carboxyl-14C] and then a nonlabeled sample of bis(2-ethylhexyl)terephthalate. In the initial tests using the 14C-labeled sample of test chemical, hydrolysis was assessed based on both solution concentrations and mass balance determinations. In the second tests using the non-labeled test chemical, hydrolysis was assessed using mass balance data. The mass balance data indicate that even at 50°C little if any hydrolysis of bis(2-ethylhexyl)terephthalate occurs in the pH range of 4 to 9. This is supported by SPARC calculations that indicate that hydrolyses is unlikely to occur. Also, as this substance is readily biodegradable Column 2 of Annex 8 indicates that a hydrolysis study is not required.