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Vapour pressure

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vapour pressure
Type of information:
experimental study
Adequacy of study:
disregarded due to major methodological deficiencies
3 (not reliable)
Rationale for reliability incl. deficiencies:
significant methodological deficiencies
according to guideline
OECD Guideline 104 (Vapour Pressure Curve)
Type of method:
dynamic method
20 °C
Vapour pressure:
210 Pa
The test item HEDP #13082 has a vapour pressure of 210 Pa at 20°C.

Description of key information

Vapour pressure: 7.7E-11 Pa at 25°C

Key value for chemical safety assessment

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

Additional information

A predicted vapour pressure value of 7.7E-11 Pa at 25°C was obtained for the substance using an accepted calculation method (MPBPVP program, USEPA/Syracuse Research, v1.43). The result is considered to be a reliable indication of involatile nature of the substance.

In a disregarded study, measured vapour pressure of 210 Pa at 20°C was obtained for the substance using the dynamic method. The submission substance is a fully neutralised phosphonic acid salt, involatile and with a melting temperature of >500°C. The measured result might be influenced by presence of volatile impurities and as such the result is disregarded and not used for assessment purposes.