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EC number: 263-171-2 | CAS number: 61791-39-7
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Testing was conducted between 09 June 2011 and 21 June 2011.
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: see 'Remark'
- Remarks:
- Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results. The study report was conclusive, done to a valid guideline and the study was conducted under GLP conditions.
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: vapour pressure balance
- Temp.:
- 25 °C
- Vapour pressure:
- 0.001 Pa
- Transition / decomposition:
- no
- Conclusions:
- The vapour pressure of the test item has been determined to be 5.1 x 10-4 Pa at 25ºC.
- Executive summary:
Method
The vapour pressure was determined using a vapour pressure balance withasurents being made at several temperatures and linear regression analysis used to calculate the vapour pressure at 25°C. Testing was conducted using procedure designed to be compatible with Method A4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.
Summary of Results
Run
Log10[Vp(25ºC)]
7
-3.059
8
-3.366
9
-3.270
10
-3.460
Mean
-3.289
Vapour Pressure
5.140 x 10-4 Pa
The test item did not change in appearance under the conditions used in the determination.
Conclusion
The vapour pressure of the test item has been determined to be 5.1 x 10-4 Pa at 25ºC.
Reference
Run 7
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapour Pressure (Pa) |
Log10Vp |
96 |
369.15 |
0.002708926 |
68.61 |
6.861E-08 |
0.095248258 |
-1.021142959 |
97 |
370.15 |
0.002701607 |
71.72 |
7.172E-08 |
0.099565735 |
-1.001890098 |
98 |
371.15 |
0.002694328 |
73.62 |
7.362E-08 |
0.102203421 |
-0.990534566 |
99 |
372.15 |
0.002687089 |
77.51 |
7.751E-08 |
0.107603738 |
-0.968172642 |
100 |
373.15 |
0.002679887 |
82.11 |
8.211E-08 |
0.113989716 |
-0.943134327 |
101 |
374.15 |
0.002672725 |
85.94 |
8.594E-08 |
0.119306738 |
-0.923335029 |
102 |
375.15 |
0.002665600 |
89.55 |
8.955E-08 |
0.124318343 |
-0.905464789 |
103 |
376.15 |
0.002658514 |
95.62 |
9.562E-08 |
0.132745058 |
-0.876981639 |
104 |
377.15 |
0.002651465 |
103.03 |
1.030E-07 |
0.143032036 |
-0.844566679 |
105 |
378.15 |
0.002644453 |
109.91 |
1.099E-07 |
0.152583239 |
-0.816493171 |
A plot of Log10(vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 7 gives the following statistical data using an unweighted least squares treatment.
Slope -3144.046
Standard deviation in slope 127.857
Intercept 7.486
Standard deviation in intercept 0.342
The results obtained indicate the following vapour pressure relationship:
Log10(Vp (Pa)) = -3144.046/temp(K) + 7.486
The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of -3.059.
Run 7 - Graph of Log10Vapour Pressure vs Reciprocal Temperature see Attachment 3 Run 7 to 10.
Run 8
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapour Pressure (Pa) |
Log10Vp |
97 |
370.15 |
0.002701607 |
65.53 |
6.553E-08 |
0.090972429 |
-1.041090211 |
98 |
371.15 |
0.002694328 |
68.75 |
6.875E-08 |
0.095442614 |
-1.020257676 |
99 |
372.15 |
0.002687089 |
71.04 |
7.104E-08 |
0.098621720 |
-1.006027426 |
100 |
373.15 |
0.002679887 |
75.12 |
7.512E-08 |
0.104285806 |
-0.981774799 |
101 |
374.15 |
0.002672725 |
79.63 |
7.963E-08 |
0.110546841 |
-0.956453663 |
102 |
375.15 |
0.002665600 |
84.68 |
8.468E-08 |
0.117557535 |
-0.929749529 |
103 |
376.15 |
0.002658514 |
90.62 |
9.062E-08 |
0.125803777 |
-0.900306321 |
104 |
377.15 |
0.002651465 |
97.63 |
9.763E-08 |
0.135535453 |
-0.867947089 |
105 |
378.15 |
0.002644453 |
103.95 |
1.040E-07 |
0.144309232 |
-0.840705885 |
A plot of Log10(vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 8 gives the following statistical data using an unweighted least squares treatment.
Slope -3548.443
Standard deviation in slope 139.658
Intercept 8.535
Standard deviation in intercept 0.373
The results obtained indicate the following vapour pressure relationship:
Log10(Vp (Pa)) = -3548.443/temp(K) + 8.535
The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of -3.366.
Run 8 - Graph of Log10Vapour Pressure vs Reciprocal Temperature see Attachment 3 Run 7 to 10.
Run 9
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapour Pressure (Pa) |
Log10Vp |
96 |
369.15 |
0.002708926 |
58.71 |
5.871E-08 |
0.081504521 |
-1.088818298 |
97 |
370.15 |
0.002701607 |
61.87 |
6.187E-08 |
0.085891411 |
-1.066050263 |
98 |
371.15 |
0.002694328 |
64.91 |
6.491E-08 |
0.090111710 |
-1.045218770 |
99 |
372.15 |
0.002687089 |
68.22 |
6.822E-08 |
0.094706838 |
-1.023618664 |
100 |
373.15 |
0.002679887 |
71.27 |
7.127E-08 |
0.098941019 |
-1.004623620 |
101 |
374.15 |
0.002672725 |
76.03 |
7.603E-08 |
0.105549119 |
-0.976545388 |
102 |
375.15 |
0.002665600 |
80.95 |
8.095E-08 |
0.112379339 |
-0.949313526 |
103 |
376.15 |
0.002658514 |
85.71 |
8.571E-08 |
0.118987439 |
-0.924498884 |
104 |
377.15 |
0.002651465 |
90.12 |
9.012E-08 |
0.125109649 |
-0.902709196 |
105 |
378.15 |
0.002644453 |
97.69 |
9.769E-08 |
0.135618748 |
-0.867680269 |
A plot of Log10(vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 9 gives the following statistical data using an unweighted least squares treatment.
Slope -3373.879
Standard deviation in slope 82.220
Intercept 8.042
Standard deviation in intercept 0.220
The results obtained indicate the following vapour pressure relationship:
Log10(Vp (Pa)) = -3373.879/temp(K) + 8.042
The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of -3.270.
Run 9 - Graph of Log10Vapour Pressure vs Reciprocal Temperature see Attachment 3 Run 7 to 10.
Run 10
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapour Pressure (Pa) |
Log10Vp |
97 |
370.15 |
0.002701607 |
56.76 |
5.676E-08 |
0.078797422 |
-1.103487992 |
98 |
371.15 |
0.002694328 |
60.22 |
6.022E-08 |
0.083600788 |
-1.077789628 |
99 |
372.15 |
0.002687089 |
63.08 |
6.308E-08 |
0.087571201 |
-1.057638694 |
100 |
373.15 |
0.002679887 |
67.43 |
6.743E-08 |
0.093610115 |
-1.028677219 |
101 |
374.15 |
0.002672725 |
70.74 |
7.074E-08 |
0.098205243 |
-1.007865323 |
102 |
375.15 |
0.002665600 |
75.98 |
7.598E-08 |
0.105479706 |
-0.976831090 |
103 |
376.15 |
0.002658514 |
80.65 |
8.065E-08 |
0.111962862 |
-0.950926007 |
104 |
377.15 |
0.002651465 |
86.19 |
8.619E-08 |
0.119653802 |
-0.922073498 |
105 |
378.15 |
0.002644453 |
90.68 |
9.068E-08 |
0.125887072 |
-0.900018867 |
A plot of Log10(vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 10 gives the following statistical data using an unweighted least squares treatment.
Slope -3606.821
Standard deviation in slope 57.662
Intercept 8.638
Standard deviation in intercept 0.154
The results obtained indicate the following vapour pressure relationship:
Log10(Vp (Pa)) = -3606.821/temp(K) + 8.638
The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of -3.460.
Run 10 - Graph of Log10Vapour Pressure vs Reciprocal Temperature see Attachment 3 Run 7 to 10.
Description of key information
The vapour pressure of the test item has been determined to be 5.1 x 10E-4Pa at 25ºC.
Key value for chemical safety assessment
- Vapour pressure:
- 0.001 Pa
- at the temperature of:
- 25 °C
Additional information
INTRODUCTION
Hazardous physico-chemical properties of the test item have been determined. Methods employed are designed to be compatible with Commission Regulation (EC) No 440/2008 of 30 May 2008, Part A: Methods for the determination of physico-chemical properties and the current OECD Guidelines for Testing of Chemicals.
Method
The vapour pressure was determined using a vapour pressure balance withasurents being made at several temperatures and linear regression analysis used to calculate the vapour pressure at 25°C. Testing was conducted using procedure designed to be compatible with Method A4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.
Summary of Results
Run |
Log10[Vp(25ºC)] |
7 |
-3.059 |
8 |
-3.366 |
9 |
-3.270 |
10 |
-3.460 |
Mean |
-3.289 |
Vapour Pressure |
5.140 x 10-4Pa |
The test item did not change in appearance under the conditions used in the determination.
Conclusion
The vapour pressure of the test item has been determined to be 5.1 x 10-4Pa at 25ºC.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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