Registration Dossier
Registration Dossier
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EC number: 267-956-0 | CAS number: 67953-76-8
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
Vapour pressure [HEDP-xK]: < 1.7E-08 Pa at 25°C (QSAR)
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
The vapour pressure of the sodium salt of HEDP has been read-across from the parent acid (HEDP-H). A predicted vapour pressure of 1.7E-8 Pa at 25°C was obtained for HEDP-H using an accepted calculation method (MPBPVP program, USEPA/Syracuse Research, v1.43). This predicted value is read-across to the salt, HEDP-xK as <1.7E-8 at 25°C since the vapour pressure of the salt is expected to be lower than that of the parent acid. The result (Fisk 2010) is considered to be reliable and is selected as a key study.
The impurities are phosphonate salts that are structurally similar to the main constituent or inorganic salts; all will have negligible vapour pressure.
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