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Physical & Chemical properties

Vapour pressure

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Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report Date:
2010

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Deviations:
no
GLP compliance:
yes
Type of method:
gas saturation method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid
Details on test material:
- Purity: 100%

Results and discussion

Vapour pressureopen allclose all
Key result
Test no.:
#1
Temp.:
25.2 °C
Vapour pressure:
0 Pa
Key result
Test no.:
#2
Temp.:
35.2 °C
Vapour pressure:
0 Pa
Key result
Test no.:
#3
Temp.:
45.3 °C
Vapour pressure:
0 Pa
Key result
Temp.:
25 °C
Vapour pressure:
0 Pa
Remarks on result:
other: determined by vapour pressure curve

Any other information on results incl. tables

Vapour Pressure at 25°C

The duration of the main test conducted at 25°C was approximately 29 days. The vapour pressure of the test item was determined at three different gas flow rates. The vapour pressure of the test item was 1.0834E-7, 4.7000E-7, and 4.2335E-7 Pa at 20, 30, and 40 mL/min flow rates, respectively. These results clearly indicate that the nitrogen gas was completely saturated with test item at all three flow rates for the duration of the test. The mean value of vapour pressure was 6.5892E-7Pa.

Vapour Pressure at 35°C

The duration of the main test conducted at 35°C was approximately 30 days. The vapour pressure of the test item was determined at three different gas flow rates. The vapour pressure of the test item was 7.8117E-7, 3.5164E-7, and 2.4079E-7 Pa at 20, 30, and 40 mL/min carrier gas flow rate, respectively. These results clearly indicate that the carrier gas was completely saturated with test item at all three flow rates for the duration of the test. The mean value of vapour pressure was 4.5787E-7 Pa.

Vapour Pressure at 45°C

The duration of the main test conducted at 45°C was approximately 31 days. The vapour pressure of the test item was determined at three different gas flow rates. The vapour pressure of the test item was 6.6937E-7, 3.2473E-7, and 1.8308E-7 Pa at 20, 30, and 40 mL/min carrier gas flow rate, respectively. These results clearly indicate that the carrier gas was completely saturated with test item at all three flow rates for the duration of the test. The mean value of vapour pressure was 3.9239E-7 Pa.

VAPOURPRESSURE(P)OFTESTITEM(Pa)

 

TEMPERATURE

20 mL/min

30 mL/min

40 mL/min

Mean

 

25.2°C (298.35 K)

1.08E-06

4.70E-07

4.23E-07

6.59E-07

 

35.2°C (308.35 K)

7.81E-07

3.52E-07

2.41E-07

4.58E-07

 

45.3°C (318.45 K)

6.69E-07

3.25E-07

1.83E-07

3.92E-07

 

25°C (298.15 K)* 6.41E-7Pa (4.808E-9mm Hg or Torr)

* The vapour pressure at 25 °C presented above was calculated using linear regression equation, which resulted from plotting VP (vapour pressure in Pa) versus temerature (1/T) in Kelvin.

Applicant's summary and conclusion

Conclusions:
The measured vapour pressure of the test substance at 25, 35, and 45°C was 6.5892E-7, 4.5787E-7, and 3.9239E-7, respectively. The calculated vapour pressure at 25°C was 6.41E-7 Pa (4.808E-9 mm Hg or Torr)
Executive summary:

This study was conducted to determine the vapour pressure of the test substance. The vapour pressure was determined according to the regulatory guidelines: OPPTS 830.7950 and OECD 104 employing the Gas Saturation method. The vapour pressure of the test item was determined at three gas flow rates (approximately 20, 30, and 40 mL/min) and at three temperatures (25, 35, and 45°C). The mean vapour pressure values were 6.5892E-7, 4.5787E-7, and 3.9239E-7 Pa at 25, 35, and 45°C, respectively. The calculated vapour pressure was determined to be 6.41E-7 Pa (4.808E-9 mm Hg or Torr) at 25 °C.