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Physical & Chemical properties

Vapour pressure

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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:
2001
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

Constituent 1
Chemical structure
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%

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