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EC number: 210-276-6 | CAS number: 611-71-2
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 001
- Report date:
- 2001
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- GLP compliance:
- no
- Type of method:
- gas saturation method
Test material
- Reference substance name:
- L-2-hydroxy-2-phenylacetic acid
- EC Number:
- 210-276-6
- EC Name:
- L-2-hydroxy-2-phenylacetic acid
- Cas Number:
- 611-71-2
- Molecular formula:
- C8H8O3
- IUPAC Name:
- hydroxy(phenyl)acetic acid
- Test material form:
- other: solid
- Details on test material:
- Name of test material (as cited in study report): (R)-(-)-mandelic acid
Analytical purity: > 99.5%
Constituent 1
Results and discussion
Vapour pressureopen allclose all
- Temp.:
- 20 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: calculated from the regression equation
- Temp.:
- 25 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: calculated from the regression equation
- Temp.:
- 50 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: calculated from the regression equation
Any other information on results incl. tables
Results:
Temperature [°C] |
Vapour pressure (exp.) [hPa] |
Vapour pressure (calc.) [hPa] |
Aberration [%] |
69.6 |
0.000995 |
0.001292 |
-29.84 |
69.8 |
0.00181 |
0.001329 |
26.59 |
82.7 |
0.00687 |
0.007593 |
-10.52 |
93.8 |
0.0297 |
0.03084 |
-3.84 |
94.1 |
0.0350 |
0.03199 |
8.59 |
The regression of the results leads with a mean deviation of < 20 % to the following equation:
ln(p/hPa) = 34.5492 - 16489.22 / (273.15 + t/°C)
The vapour pressure at 20 °C, 25 °C and 50°C was calculated from the regression equation.
Applicant's summary and conclusion
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