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Physical & Chemical properties

Vapour pressure

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Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
5 May 2017 to 14 July 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Deviations:
no
GLP compliance:
yes
Type of method:
spinning rotor
Key result
Test no.:
#1
Temp.:
10 °C
Vapour pressure:
0.004 Pa
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0.002 Pa
Key result
Test no.:
#1
Temp.:
30 °C
Vapour pressure:
0.002 Pa

Background Vapor Pressure and System Out-Gassing Rate Measurements at 10 °C, 20 °C and 30°C ± 1 °C

Using Air Parameters

Temperature (°C) Measured vapor pressure (pa) Min/Max Temperature (°C) Mean
Measured
Vapor Pressure
(Pa)		 Standard
Deviation
(Pa)		 Coefficient
of Variation
(CV)
10 8.95 E-06 9.9/10.0 4.74 x 10-6 1.1 E-05 230%
1.29 E-05 9.9/10.0
-7.62 E-06 9.8/9.9
20 1.36 E-05 20.0/20.1 2.94 x 10-6 1.3 E-05 443%
6.83 E-06 20.0/20.1
-1.16 E-05 20.0/20.1
30 1.68 E-05 29.6/30.2 2.19 x 10-5 1.9 E-05 85%
4.25 E-05 29.6/30.2
6.27 E-06 29.6/30.2

Temperature (°C) Measured Out-gassing Rate (Pa/s) Min/Max
Temperature
(°C)		 Mean
Measured
Out-gassing Rate
(Pa/s)		 Standard
Deviation
(Pa/s)
10 7.28 E-08 9.9/10.0 6.27 E-08 1.5 E-08
7.02 E-08 9.9/10.0
4.52 E-08 9.8/9.9
20 4.79 E-07 20.0/20.1 4.81 E-07 3.5 E-09
4.79 E-07 20.0/20.1
4.85 E-07 20.0/20.1
30 6.29 E-07 29.6/30.2 6.26 E-07 1.0 E-08
6.14 E-07 29.6/30.2
6.34 E-07 29.6/30.2
Conclusions:
The mean measured vapor pressure of the test substance by the SRG was 3.97 E-03 Pa (N = 3, CV = 20%) at 10 °C, 1.90 E-03 Pa (N = 3, CV = 14%) at 20 °C and 2.26 E-03 Pa (N = 3, CV = 18%) at 30 °C.
Executive summary:

The vapor pressure of the test substance was determined at three temperatures, 10 °C, 20 °C and 30 °C using the spinning rotor gauge method. The mean measured vapor pressure of the test substance by the SRG was 3.97E-03 Pa (N = 3, CV = 20%) at 10 °C, 1.90E-03 Pa (N = 3, CV = 14%) at 20 °C and 2.26E-03 Pa (N = 3, CV = 18%) at 30 °C. The change in vapor pressure between each temperature condition was within the expected reproducibility variation of the SRG method for a UVCB therefore test substance was determined to have a constant vapor pressure within the range of temperatures investigated (i.e. 10 °C to 30 °C).

Description of key information

The mean measured vapor pressure of the test substance by the SRG was 3.97 x 10 -3 Pa (N = 3, CV = 20%) at 10°C, 1.90 x 10-3 Pa (N = 3, CV = 14%) at 20°C and 2.26 x 10-3 Pa (N = 3, CV = 18%) at 30°C.

Key value for chemical safety assessment

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

Additional information