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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:
From 2018-01-29 to 2018-03-30
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
GLP compliance:
yes
Type of method:
effusion method: Knudsen cell
Specific details on test material used for the study:
Batch No.: 20170707
Purity: 99.13%
Key result
Test no.:
#1
Temp.:
114 °C
Vapour pressure:
9.792 Pa
Key result
Test no.:
#2
Temp.:
116 °C
Vapour pressure:
10.755 Pa
Key result
Test no.:
#3
Temp.:
118 °C
Vapour pressure:
12.056 Pa
Key result
Test no.:
#4
Temp.:
120 °C
Vapour pressure:
13.28 Pa
Key result
Temp.:
20 °C
Vapour pressure:
0.015 Pa
Remarks on result:
other: Extrapolated to 20°C
Conclusions:
The vapor pressure of test item extrapolated to 20°C is 0.014955 Pa.
Executive summary:

The vapor pressure of the test substance by Knudsen effusion method was measured using a Surface Measurement System VPA-1, vapor pressure analyzer based on the methodology referenced in OPPTS 830.7950 and OECD 104. The Knudsen effusion method is a dynamic

gravimetric technique based on the rate of escape of vapor molecules through an orifice of known dimension in a Knudsen cell into a vacuum at a known temperature. The rate of mass loss through the orifice per unit of time was measured and used to calculate the vapor pressure. Calculations were performed using VPA Analysis: DVS Std v 7.1.0 (includes VPA analysis Software v0.6).

The vapor pressure of test item extrapolated to 20°C is 0.014955 Pa.

Description of key information

The vapor pressure of test item extrapolated to 20°C is 0.014955 Pa.

Key value for chemical safety assessment

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

Additional information

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