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EC number: 427-430-5 | CAS number: 54301-26-7
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP study, EU guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- 2000-04-26
- Type of method:
- effusion method: vapour pressure balance
- Temp.:
- ca. 25 °C
- Vapour pressure:
- ca. 1.327 Pa
- Remarks on result:
- other: Extrapolation to 25°C gave a vapour pressure of 1.327 x i0 Pa which has been taken as a maximum for this material.
- Conclusions:
- The vapour pressure of the test material has been determined to be less than 1.4 x 10^-4 Pa at 25°C.
- Executive summary:
Method.
The test procedure was Method A4 specified in Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC).
Result.
The test material has been determined to have a vapour pressure of less than 1.4 x 10^-4 Pa at 25°C, using a vapour pressure balance.
Reference
No statistical analyses were performed because the balance readings were too low and variable for a une of best fit to have any meaning. Instead it was considered more appropriate to impose a regression siope on a chosen data point to provide an estimate of the maximum value for the vapour pressure at 25°C.
Run 4 was chosen because the sample had been under vacuum for the longest period prior to this run and so degassing would have been the most complete. The reading at 90°C (363.15K) was chosen because this is the data point which gives the highest estimated vapour pressure at any given temperature when a siope of -1500K is imposed upon it.
The value of -1500K is an in-house value and is the shallowest slope observed whilst determining the vapour pressure on a wide range of samples using the vapour pressure balance method. Extrapolation to 25°C gave a vapour pressure of 1.327 x i0 Pa which has been taken as a maximum for this material.
The test material did flot change in appearance under the conditions used in the determination.
Description of key information
In compliance with the test procedure of the Method A4 specified in Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC),the test material has been determined to have a vapour pressure of less than 1.4 x 10-4 Pa at 25°C, using a vapour pressure balance.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
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