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EC number: 223-267-7 | CAS number: 3794-83-0
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- disregarded due to major methodological deficiencies
- Reliability:
- 3 (not reliable)
- Rationale for reliability incl. deficiencies:
- significant methodological deficiencies
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Type of method:
- dynamic method
- Temp.:
- 20 °C
- Vapour pressure:
- 210 Pa
- Conclusions:
- The test item HEDP #13082 has a vapour pressure of 210 Pa at 20°C.
Reference
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.
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