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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
February 22, 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
no
Type of method:
effusion method: by loss of weight or by trapping vaporisate
Test material information:
Composition 1
Temp.:
20 °C
Vapour pressure:
0 Pa
Temp.:
25 °C
Vapour pressure:
0 Pa
Measured Temperature Weight Loss vT log (ǀvTǀ) log (pv) Vapor pressure pV 1/T
[°C] [mg/min] [-] [log (Pa)] [Pa] [1/K]
135 -2,24E-04 -3,65 -0,22 0,60 2,45E-03
150 -2,53E-03 -2,60 0,79 6,21 2,36E-03
166 -7,93E-03 -2,10 1,27 18,7 2,28E-03
181 -2,00E-02 -1,70 1,66 45,6 2,20E-03
196 -4,70E-02 -1,33 2,02 104 2,13E-03
212 -9,70E-02 -1,01 2,32 209 2,06E-03

Due to the low mass loss at 120 °C the vapour pressure of the sample was calculated between 150 °C and 210 °C. The calculated mass loss within this temperature range is 5.14 mg (corresponds to 29.7 %), which results in a vapour pressure of 3.0 x 10^-5 Pa at 20 °C and 5.9 x 10^-5 Pa at 25 °c .

Conclusions:
The vapour pressure of propyl gallate was determined according to OECD guideline 104 and is 3.0E-5 Pa at 20 °C and 5.9E-5 Pa at 25 °C, respectively
Executive summary:

Due to the low mass loss at 120 °C the vapour pressure of the sample was calculated between 150 °C and 210 °C. The calculated mass loss within this temperature range is 5.14 mg (corresponds to 29.7 %), which results in a vapour pressure of 3.0E-5 Pa at 20 °C and 5.9E-5 Pa at 25 °C.

Description of key information

The vapour pressure of propyl gallate was determined according to OECD guideline 104. Due to the low mass loss at 120 °C the vapour pressure of propyl gallate was calculated between 150 °C and 210 °C. The calculated mass loss within this temperature range is 5.14 mg (corresponds to 29.7 %), which results in a vapour pressure of 3.0E-5 Pa at 20 °C and 5.9E-5 Pa at 25 °C.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
20 °C

Additional information

Due to the low mass loss at 120 °C the vapour pressure of the sample was calculated between 150 °C and 210 °C. The calculated mass loss within this temperature range is 5.14 mg (corresponds to 29.7 %), which results in a vapour pressure of 3.0E-5 Pa at 20 °C and 5.9E-5 Pa at 25 °C .