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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Partition coefficient

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Description of key information

The log octanol/water partition coefficient (log Kow) of dimethyl terephthalate has been determined according to the shake-flask procedure described in OECD Guideline 107. The log Kow of DMT (mean of six determinations) is 2.21.  
The log Pow of dimethyl terephthalate was estimated using the KOWWIN v1.67 QSAR model available from the US EPA. The estimated log Kow of dimethyl terephthalate is 1.66. Additionally, KOWWIN provides a measured log Kow value of 2.25 for dimethyl terephthalate, retrieved from the data base of experimental results used to construct the QSAR model, and this value corresponds closely to the result of the shake-flask determination performed according to OECD Guideline 107.
Wherever other models of the US EPA's EPISUITE QSAR programs have been used to generate estimates of physico-chemical or environmental fate and behaviour characteristics that require input of log Kow, these secondary models selected the database (measured) log Kow of 2.25 as the default value for dimethyl terephthalate.

Key value for chemical safety assessment

Log Kow (Log Pow):
at the temperature of:
25 °C

Additional information