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EC number: 482-130-1 | CAS number: -
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:
- 8 July 2008 and 22 August 2008
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Date of inspection: December 2002; Date of certificate: February 2003
- Type of method:
- effusion method: vapour pressure balance
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Transition / decomposition:
- no
- Transition temp.:
- 25 °C
- Conclusions:
- The vapour pressure of the test material has been determined to be 1.1 E-6 Pa at 25ºC.
- Executive summary:
The vapour pressure of 'Paraffin waxes (Fischer-Tropsch), full-range, C15-50 - branched and linear' was determined using a vapour pressure balance. The temperature of the sample was controlled electronically. The mass and temperature readings were recorded automatically into a computer file. After evacuating the system, opening the shutter above the sample oven causes the escaping vapour jet to be directed at the scale pan. The difference in mass readings with the orifice covered and uncovered is proportional to the vapour pressure at the given oven temperature.
The vapour pressure of the test material has been determined to be 1.1 x 10-6 Pa at 25ºC
Reference
Summary of Results
Run |
Log10[Vp(25ºC)] |
1 |
-6.059 |
2 |
-6.005 |
3 |
-5.973 |
4 |
-5.842 |
5 |
-5.915 |
Mean |
-5.959 |
Vapour Pressure |
1.1 x 10-6Pa |
The test material did not change in appearance under the conditions used in the determination.
Description of key information
vapour pressure of the test material (determined using EU Method A.4, vapour pressure balance with measurements being made at several temperatures and linear regression analysis used to calculate the vapour pressure at 25 °C): 1.1 x 10E-6 Pa at 25 ºC (arithmetic mean of five determinations).
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
The test material did not change in appearance under the conditions used in the determination.
Predicted vapour pressure values, calculated using a validated QSAR method, are available for individual constituents of the registration substance. Predictions are in the range 9.7E-19 to 2.4 Pa at 25°C.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
