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Physical & Chemical properties

Vapour pressure

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Description of key information

Vapour pressure (calculated): < 0.001 Pa at 20°C.

Key value for chemical safety assessment

Additional information

Experimental vapour pressure data are not available.

The test substance is the sodium salt of ethyl 4-hydroxybenzoate. It appears solid at ambient temperature with a high melting point (268 °C). For ionic solids with high melting points it is unlikely to have a high vapour pressure at ambient temperature. Thus it is scientifically justified to use calculated, non-experimental data for this endpoint.

The vapour pressure is calculated from structural parameters. The algorithm is derived from a correlation of a large number of chemical structures with experimental vapour pressures. Software: MPBPWin v1.43 (Syracuse Research Corp.)

The vapour pressure was determined to be < 0.001 Pa at 20 °C by the calculation method defined above.