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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2000-09-19 to 2000-09-28
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
EEC Directive 92/69, appendix L 383 A
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
OECD Guideline No. 104 (July 27th 1995)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
static method
Key result
Test no.:
#1
Temp.:
20.2 °C
Vapour pressure:
432.25 Pa
Key result
Test no.:
#2
Temp.:
40.3 °C
Vapour pressure:
892.43 Pa

temp.(°C)

mean T

+/- st.dev

1/T

P (mm Hg)

mean P

+/- st.dev

log (P)

20.2

20.2

0.05

3.4 10-3

3.16

3.25

0.09

0.4997

20.1

   

3.4 10-3

3.34

   

0.5237

40.5

40.3

0.25

3.2 10-3

6.88

6.71

0.18

0.8376

40.0

   

3.2 10-3

6.53

   

0.8149

 

Conclusions:
The estimated vapour pressure at 20 °C is 413 Pa.
Executive summary:

The vapour pressure of test item has been determined according to the static method described in OECD Guideline n. 104 (July 27 1995), and to the EEC Directive 92/69, appendix L 383 A in which the vapour pressure occurring in a closed system in a thermodynamic equilibrium state is measured at two specified temperatures between -20 °C and +70 °C. The measurement range stretches from 100/200 to 105 Pa. The vapour pressure has been measured at two temperatures chosen to be nominal values of 20.2 °C and 40.3 °C.

Description of key information



The estimated vapour pressure of the test item at 20 °C is 413 Pa (reference 4.6-1).

Key value for chemical safety assessment

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

Additional information



The vapour pressure of test item has been determined according to the static method described in OECD Guideline No. 104 (July 27 1995), and to the EEC Directive 92/69, appendix L 383 A in which the vapour pressure occurring in a closed system in a thermodynamic equilibrium state is measured at two specified temperatures between -20 °C and +70 °C. The measurement range stretches from 100/200 to 105 Pa. The vapour pressure has been measured at two temperatures chosen to be nominal values of 20.2 °C and 40.3 °C. The vapour pressure was extrapolated to be 413 Pa at 20 °C.