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EC number: 246-677-8 | CAS number: 25155-23-1
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 18 and 28 of November 2014
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Recent study conducted to detailed method.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Temp.:
- 50 °C
- Vapour pressure:
- 0 Pa
- Conclusions:
- Based on the results, the vapor pressure of the compound is calculated as being equal to 1.6 x 10-6 Pa (1.6 x 10-8 mbar) at 20 °C, and 9.2 x 10-5 Pa (9.2 x 10-7 mbar) at 50 °C.
- Executive summary:
The vapor pressure of trixylyl phosphate (TXP) (CAS no. 25155-23-1) was measured using the Knudsen effusion method (mass-loss technique), according to the guidelines OECD 104 / EU A.4. The quality of the apparatus was previously verified with the measurement of well-known reference compounds.
Experiments were performed at three temperatures between 70 °C and 90 °C. Results permit the establishment of the relation between the vapor pressure of the compound and temperature, allowing the knowledge of the vapor pressure at different temperatures.
Based on the results, the vapor pressure of the compound is calculated as being equal to 1.6 x 10-6 Pa (1.6 x 10-8 mbar) at 20 °C, and 9.2 x 10-5 Pa (9.2 x 10-7 mbar) at 50 °C.
Reference
Description of key information
Vapour pressure
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
A single GLP compliant gives the vapour pressure as 1.6 x 10-6 Pa at 20 °C. The other study is discarded, as the method utilised was incorrect.
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