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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties

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.