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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:
07 March 2018 to 28 March 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: isothermal thermogravimetry
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0.031 Pa
Remarks on result:
other: equivalent to 2.3 x 10E-04 mm Hg
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0.057 Pa
Remarks on result:
other: equivalent to 4.2 x 10E-04 mm Hg

RESULTS

- A representative weight loss curve of the test item is shown in Figure 4 (attached). 

- The results of the isothermal TGA analysis for the test item are given in Table 3 (attached).

- The test item vapour pressure results at 20 °C and 25 °C are given in Table 4 (attached).

- The vapour pressure regression curve of the log Pt of the test item as function of the reciprocal temperatures is shown in Figure 5 (attached). The equation of the curve was: log Pt = -4651´1/T + 14.35 (r = 0.9995, n = 8).

Conclusions:
The vapour pressure of the test item was determined to be 3.1 x 10E-02 Pa at 20°C (equivalent to 2.3 x 10E-04 mm Hg) and 5.7 x 10E-02 Pa at 25°C (equivalent to 4.2 x 10E-04 mm Hg).
Executive summary:

GUIDELINE

The investigation was conducted in accordance with OECD Guideline 104 Vapour Pressure (March 23, 2006), EC Guideline A.4 Vapour Pressure (March 04, 2016) and EPAProduct Properties Test Guideline OPPTS 830.7950: Vapor pressure (August 1996). The isothermal TGA effusion method was applied for the determination of the vapour pressure of the test item.

 

RESULTS

The vapour pressure of the test item was determined to be 3.1 x 10E-02 Pa at 20°C (equivalent to 2.3 x 10E-04 mm Hg) and 5.7 x 10E-02 Pa at 25°C (equivalent to 4.2 x 10E-04 mm Hg).

Description of key information

The vapour pressure of the test item was determined to be 3.1 x 10E-02 Pa at 20 °C (equivalent to 2.3 x 10E-04 mm Hg) and 5.7 x 10E-02 Pa at 25 °C (equivalent to 4.2 x 10E-04 mm Hg) (OECD 104, EU Method A.4 and OPPTS 830.7950).

Key value for chemical safety assessment

Vapour pressure:
0.057 Pa
at the temperature of:
25 °C

Additional information

GUIDELINE

The investigation was conducted in accordance with OECD Guideline 104 Vapour Pressure (March 23, 2006), EC Guideline A.4 Vapour Pressure (March 04, 2016) and EPA Product Properties Test Guideline OPPTS 830.7950: Vapor pressure (August 1996). The isothermal TGA effusion method was applied for the determination of the vapour pressure ofthe test item.

 

RESULTS

The vapour pressure of the test item was determined to be 3.1 x 10E-02 Pa at 20°C (equivalent to 2.3 x 10E-04 mm Hg) and 5.7 x 10E-02 Pa at 25°C (equivalent to 4.2 x 10E-04 mm Hg).