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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:
21 August 2015 to 11 September 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study performed in accordance with OECD, EU & US EPA test guidelines in compliance with GLP and reported with a valid GLP certificate
Reason / purpose:
reference to same 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 (incl. certificate)
Type of method:
effusion method: by loss of weight or by trapping vaporisate
Remarks:
isothermal thermogravimetric
Temp.:
20 °C
Vapour pressure:
< 0 Pa
Temp.:
20 °C
Vapour pressure:
< 0 mm Hg
Temp.:
25 °C
Vapour pressure:
< 0 Pa
Temp.:
25 °C
Vapour pressure:
< 0 mm Hg

Results of the isothermal GA analysis

Temperature [°C]

Weight loss [μg/min]

vT

[g/cm2/h]

Log vT

Log PT

PT

[Pa]

210

0.6435

1.171

7.58 x 10-5

1.40 x 10-4

-4.11

-3.85

-0.17

0.14

0.68

1.4

220

0.9583

1.228

1.14 x 10-4

1.47 x 10-4

-3.94

-3.83

0.04

0.16

1.1

1.5

230

1.282

1.315

1.53 x 10-4

1.57 x 10-4

-3.82

-3.80

0.18

0.20

1.5

1.6

240

1.646

1.497

1.96 x 10-4

1.79 x 10-4

-3.71

-3.75

0.31

0.26

2.0

1.8

 

Conclusions:
The vapour pressure of the test item was:
<1.3 E-8 Pa (20°C)
<1.0 E-10 mm Hg (20°C)
<2.9 E-8 Pa (25°C)
<2.2 E-10 (25°C)
Executive summary:

The isothermal TGA effusion method was applied for the determination of the vapour pressure of 2,2-Bis[[3-(dodecylthio)-1-oxopropoxy]methyl]propane-1,3-diyl bis[3-(dodecylthio)propionate].

 

Study performed in accordance with the following guidelines:

European Community (EC), EC no. 761/2009, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.4: “Vapour Pressure", Official Journal of the European Union no. L220, August 24, 2009.

Organization for Economic Co-operation and Development (OECD), OECD Guidelines for the Testing of Chemicals no.104: "Vapour Pressure", March 23, 2006.

United States Environmental Protection Agency (EPA), Product Properties Test Guidelines no. OPPTS 830.7950: "Vapor pressure", August 1996.

 

The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:

 

20°C

25°C

[Pa]

[mm Hg]

[Pa]

[mm Hg]

Test item

<1.3 x 10-8

<1.0 x 10-10

<2.9 x 10-8

<2.2 x 10-10

 

The weight losses of the test item were obtained with a temperature program of above the melting temperature of the test item.

Description of key information

Key value determined in GLP accredited laboratory test using TGA effusion method in accordance with OECD Guideline 104, EU Method A.4 & US EPS Procedure 830.7950

Key value for chemical safety assessment

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

Additional information

The isothermal TGA effusion method was applied for the determination of the vapour pressure of 2,2-Bis[[3-(dodecylthio)-1-oxopropoxy]methyl]propane-1,3-diyl bis[3-(dodecylthio)propionate].

 

The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:

 

20°C

25°C

[Pa]

[mm Hg]

[Pa]

[mm Hg]

Test item

<1.3 x 10-8

<1.0 x 10-10

<2.9 x 10-8

<2.2 x 10-10

 

The weight losses of the test item were obtained with a temperature program of above the melting temperature of the test item.