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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:
2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
other: ASTM D6378-2010 Standard Test Method for Determination of Vapor Pressure (VPx) of Petroleum Products, Hydrocarbons, and Hydrocarbon-Oxygenate Mixtures (Triple Expansion Method)
Version / remarks:
ASTM D6378-2010
Principles of method if other than guideline:
The vapor pressure was determined according to “ASTM D6378-2010”: Employing the apparatus, MINIVAP VPXpert Vapor Pressure Tester, a certain volume of the sample is drawn into the temperature-controlled chamber with a built-in piston. After sealing the chamber, an expansion is performed in three steps to a final volume of (X+1) times that of the test specimen. After each expansion, the total pressure (TPx) is determined. The partial pressure from dissolved air (PPA) and the solubility of air in the specimen can be calculated from the three resulting pressures. The temperature of the chamber is then increased to a specified value, and the TPx is determined. The vapor pressure (VPx) can be obtained by subtracting the PPA in the liquid, which has been gas corrected for the temperature, from TPx.
GLP compliance:
not specified
Type of method:
other: Triple Expansion Method
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
1.1 kPa
Test no.:
#2
Temp.:
20 °C
Vapour pressure:
1.13 kPa
Test no.:
#3
Temp.:
20 °C
Vapour pressure:
1.14 kPa
Temp.:
20 °C
Vapour pressure:
ca. 1.1 kPa
Conclusions:
Based on the determination results, the vapor pressure of tert-butylbenzene (EC:202-632-4) (at 20 °C) is 1.1 kPa.

Description of key information

The vapoue pressure was determined according to ASTM D6378-2010 Standard Test Method for Determination of Vapor Pressure (VPx) of Petroleum Products, Hydrocarbons, and Hydrocarbon-Oxygenate Mixtures (Triple Expansion Method).

Key value for chemical safety assessment

Vapour pressure:
1.1 kPa
at the temperature of:
20 °C

Additional information