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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


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Description of key information

Relative Density: 1.0017 g/cm3 (ASTM D1475)

Key value for chemical safety assessment

Relative density at 20C:

Additional information

Relative density values of 0.984 g/cm3 (50°C), 0.955 g/cm3 (100°C) and 0.925 g/cm3 (150°C) has been determined for TOP using a method in accordance to ASTM D1475. An extrapolated value of 1.0017 g/cm3 (20°C) was determined. A value of 0.98 g/cm3 at 80°C is also reported in Drew and Propst 1981, this value is extrapolated to 1.2 g/cm3 at 20°C assuming a linear relationship between density and temperature. The substance has a density slightly higher than that of water at ambient temperature.