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Physical & Chemical properties

Vapour pressure

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Description of key information

The QSAR determination of the vapour pressure of tetrasodium hydrogen 2-phosphonatobutane-1,2,4-tricarboxylate using the model MPBPWIN included in the Estimation Program Interface (EPI) Suite v4.10 revealed a value of 0.0000000238 Pa at 25°C. The predicted value can be considered reliable yielding a useful result for further assessment.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information

As tetrasodium hydrogen 2-phosphonatobutane-1,2,4-tricarboxylate is a solid, the model uses the melting point and the boiling point for estimation. Measurements on the melting point show that for tetrasodium hydrogen 2-phosphonatobutane-1,2,4-tricarboxylate no melting point could be detected. With an onset at 60 °C a glass transition is detected with an inflection point of 62.5 °C. In addition, no boiling point could be detected, as tetrasodium hydrogen 2-phosphonatobutane-1,2,4-tricarboxylate decomposes before boiling. Therefore no experimentally determined values are available and estimated values are used for the calculation.