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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:
2018.2.27 - 2018.4.5
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
not specified
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
effusion method: isothermal thermogravimetry
Specific details on test material used for the study:
Sample name: supplied as a name of ESA
Appearance: White powder
Chemical name: 1,3,2-Dioxathiolane, 2,2-dioxide
Cos No: 1072-53-3
Purity: 100 %
Temp.:
20 °C
Vapour pressure:
0.91 Pa
Temp.:
25 °C
Vapour pressure:
1.7 Pa

Vapor pressure

The equation of the curve is:

log PT= -4 929.7 x l /T + 16.783 (r2 = 0.999 l, n=7)

Results of isothermal TGA analysis

Temperature

(ºC)

Weight loss(g)

logVT

log Pt

Pt

 

50

5.21X10^-5

-3.04

1.54

34.61

4.58X10^-5

-3.09

1.47

29.50

 

60

1.29X10^6-4

-2.65

2.03

107.96

l. 19 x 10^-4

-2.68

1.99

98.07

 

70

2.63X10^-4

-2.34

2.42

263.91

2.59X1 0^-4

-2.34

2.41

259.26

 

80

5.28X10^-4

-2.03

2.80

634.00

5.32X10^-4

-2.03

2.81

639.42

 

90

1.00X10^-3

-1.75

3.15

1 418.70

1.03X10^-3

-1.74

3.17

1 468.52

 

100

2.47X10^-3

-1.36

3.64

4 392.29

2.03X10^-3

-1.45

3.53

3 423.62

 

110

4.35X10^-3

-1.12

3.95

8 938.53

3.87X106-3

-1.17

3.89

7722.13

Vapor pressure of the test substance.

 

Temperature

("C)

log Pr

Pr (Pa)

Pr (mmHal

20

-0.04

9.l x10^-1

6.8 X10^-3

25

0.24

1.7 X 10^0

1.3 X 10^-2

50

1.52

3.3 X 10^1

2.5 X 10-1

 

Conclusions:
The isothermal TGA effusion method was used for the determination of vapor pressure of ESA. Vapor pressure of the test substance at 20ºC and
25ºC was 0.91 Pa (6.8 x 10^-3 mm Hg) and 1.7 Pa (1.3 x 10 -2 mm Hg), respectively.
Executive summary:

The isothermal TGA effusion method was used for the determination of vapor pressure of ESA. Vapor pressure of the test substance at 20ºC and

25ºC was 0.91 Pa (6.8 x 10^-3 mm Hg) and 1.7 Pa (1.3 x 10 -2 mm Hg), respectively.

Description of key information

The isothermal TGA effusion method was used for the determination of vapor pressure of ESA. Vapor pressure of the test substance at 20ºC and 25ºC was 0.91 Pa (6.8 x 10^-3 mm Hg) and 1.7 Pa (1.3 x 10 -2 mm Hg), respectively.

Key value for chemical safety assessment

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

Additional information