Triphenyl phosphate is a solid substance at room temperature with a melting point of about 48 -
50 °C and a boiling point of 245 °C (at 14.6 hPa) (Merck Index, 1996). With a density of
1.2055 g/cm³ at 50 °C triphenyl phosphate is heavier than water (Lide, 1995). The vapour pressure
has been measured and extrapolated to 25 °C with 0.000835 Pa (Dobry and Keller, 1957). Log KOW
is measured with 4.6 (Saeger et al., 1979).