Diethyl Phthalate Boiling Point

The boiling point of Diethyl Phthalate (DEP) is approximately 298°C (568°F) at standard atmospheric pressure (1 atm or 760 mmHg).

This relatively high boiling point is consistent with its use as a plasticizer, as it ensures that DEP remains stable and effective under conditions where lower-boiling compounds might evaporate.