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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Qualifier:
no guideline followed
Principles of method if other than guideline:
The vapor pressures were measured by means of a dynamic method with an ebulliometer. With this equipment, vapor pressures of pure components can be experimentally determined in a temperature range from approx. 250 to 600 K and at pressures from about
1 mbar up to 1 bar. At a given pressure (regulated by an electronic pressure control), the boiling temperatures of a component are measured. Due to the volume of the equipment only small amounts of the substances (about 20 ml) are needed.
GLP compliance:
no
Type of method:
dynamic method
Specific details on test material used for the study:
Purity: 99.638%
Boiling pt.:
201.5 °C
Atm. press.:
1 013 mBar
Decomposition:
no

Tab. 1 Experimental vapor pressure data for 2,5,7,10-Tetraoxaundecane T (K)

T (K)

P experimental (kPa)

P calculated (kPa)

1 – (Pexp/Pcalc)

318.10

0.112

0.108

-3.39%

327.83

0.208

0.213

2.20%

335.33

0.341

0.347

1.53%

339.90

0.453

0.460

1.57%

348.32

0.768

0.756

-1.62%

357.47

1.26

1.25

-0.20%

366.18

1.96

1.97

0.20%

374.67

2.99

2.97

-0.60%

382.57

4.28

4.28

-0.01%

393.07

6.75

6.75

-0.05%

408.26

12.35

12.39

0.27%

420.66

19.68

19.53

-0.79%

427.38

24.71

24.66

-0.20%

439.10

36.22

36.26

0.10%

447.13

46.59

46.56

-0.07%

455.19

59.40

59.18

-0.36%

465.08

77.18

78.36

1.50%

468.18

85.23

85.31

0.09%

475.31

102.31

103.22

0.87%

 

Tab 2a: Antoine parameters in DDB format: Log(P Torr) = A – B/(C +T °C) A : 7.37886 B : 1769.13 C : 191.857  

 

Tab 2b: Antoine parameters in Aspen format: ln(P Torr) = A + B/(C +T °C) A : 16.9905 B : -4073.57 C : 191.857

Conclusions:
Normal boiling point of 2,5,7,10-Tetraoxaundecane (TOU) has been measured by means of a dynamic method with an ebulliometer at temperature range from 318.10 to 475.31K. Using the Antoine equation, the normal boiling point has been determined as 201.5°C at 1013 mbar.
Executive summary:

Normal boiling point of 2,5,7,10-Tetraoxaundecane (TOU) has been measured by means of a dynamic method with an ebulliometer at temperature range from 318.10 to 475.31K. Using the Antoine equation, the normal boiling point has been determined as 201.5°C at 1013 mbar.

Description of key information

Normal boiling point of 2,5,7,10-Tetraoxaundecane (TOU) has been measured by means of a dynamic method with an ebulliometer at temperature range from 318.10 to 475.31K. Using the Antoine equation, the normal boiling point has been determined as 201.5°C at 1013 mbar.

Boiling point at 760 mm Hg was determined from boiling point of the test item of 65.0°C at 4 mm Hg, 101°C at 20 mm Hg and 100°C at 24 mm Hg as supporting data.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
201.5 °C

Additional information