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Environmental fate & pathways

Hydrolysis

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Description of key information

According to REACH requirements, hydrolysis studies are not necessary for substances that are readily biodegradable.  Since dimethyl terephthalate has been shown to be readily biodegradable (Point 5.2.1), a study of its hydrolysis is not required.  Hydrolysis of dimethyl terephthalate is exploited as one of the commercial production methods of terephthalic acid, but this process requires high temperatures (260 to 280 degrees C) and pressures (4500 to 5500 kPa), which implies that dimethyl terephthalate is unlikely to undergo rapid hydrolysis under normal environmental conditions.  

Key value for chemical safety assessment

Additional information

Since dimethyl terephthalate has been shown to be readily biodegradable (Point 5.2.1), a study of its hydrolysis is not required. Under environmental conditions, hydrolysis is unlikely to make a significant contribution to the dissipation of dimethyl terephthalate, compared to the rate of its removal by biodegradation.