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EC number: 287-024-7 | CAS number: 85408-62-4
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- between 10 July 2008 and 08 August 2008.
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: 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 relevant results.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 008
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- With the exception of the explosive properties and oxidising properties predictions, the work described was performed in compliance with UK GLP standards (Schedule 1, Good Laboratory Practice Regulations 1999 (SI 1999/3106 as amended by SI 2004/0994)).
- Type of method:
- effusion method: vapour pressure balance
Test material
Reference
- Name:
- Unnamed
- Type:
- Constituent
Results and discussion
Vapour pressure
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
Transition / decomposition
- Transition / decomposition:
- no
Any other information on results incl. tables
Results:
The results from runs 1 to 5 are shown in the tables below
Run 1:
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapour Pressure (Pa) |
Log10 Vp |
181 |
454.15 |
0.002201916 |
189.01 |
1.890E-07 |
0.262394304 |
-0.581045597 |
182 |
455.15 |
0.002197078 |
195.84 |
1.958E-07 |
0.271876094 |
-0.565628978 |
183 |
456.15 |
0.002192261 |
209.27 |
2.093E-07 |
0.290520375 |
-0.536823404 |
184 |
457.15 |
0.002187466 |
217.08 |
2.171E-07 |
0.301362656 |
-0.520910566 |
185 |
458.15 |
0.002182691 |
228.31 |
2.283E-07 |
0.316952773 |
-0.499005445 |
186 |
459.15 |
0.002177937 |
243.61 |
2.436E-07 |
0.338193093 |
-0.470835267 |
187 |
460.15 |
0.002173204 |
246.70 |
2.467E-07 |
0.342482804 |
-0.465361229 |
188 |
461.15 |
0.002168492 |
269.32 |
2.693E-07 |
0.373885159 |
-0.427261773 |
189 |
462.15 |
0.002163800 |
266.79 |
2.668E-07 |
0.370372871 |
-0.431360832 |
190 |
463.15 |
0.002159128 |
284.37 |
2.844E-07 |
0.394778415 |
-0.403646601 |
A plot of Log10 (vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 1 (Figure 6.2) gives the following statistical data using an unweighted least squares treatment.
Slope -4181.233
Standard deviation in slope 172.540
Intercept 8.627
Standard deviation in intercept 0.376
The results obtained indicate the following vapour pressure relationship:
Log10 (Vp (Pa)) = -4181.233/temp(K) + 8.627.
The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of -5.397.
Run 2:
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapour Pressure (Pa) |
Log10 Vp |
181 |
454.15 |
0.002201916 |
181.12 |
1.811E-07 |
0.251440963 |
-0.599563969 |
182 |
455.15 |
0.002197078 |
181.52 |
1.815E-07 |
0.251996265 |
-0.598605896 |
183 |
456.15 |
0.002192261 |
204.31 |
2.043E-07 |
0.283634624 |
-0.547240755 |
184 |
457.15 |
0.002187466 |
203.66 |
2.037E-07 |
0.282732257 |
-0.548624639 |
185 |
458.15 |
0.002182691 |
220.66 |
2.207E-07 |
0.306332613 |
-0.513806765 |
186 |
459.15 |
0.002177937 |
246.86 |
2.469E-07 |
0.342704925 |
-0.465079654 |
187 |
460.15 |
0.002173204 |
236.53 |
2.365E-07 |
0.328364239 |
-0.483644147 |
188 |
461.15 |
0.002168492 |
241.65 |
2.417E-07 |
0.335472110 |
-0.474343579 |
189 |
462.15 |
0.002163800 |
262.56 |
2.626E-07 |
0.364500547 |
-0.438301815 |
190 |
463.15 |
0.002159128 |
281.77 |
2.818E-07 |
0.391168949 |
-0.407635627 |
A plot of Log10 (vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 2 (Figure 6.3) gives the following statistical data using an unweighted least squares treatment.
Slope -4408.658
Standard deviation in slope 372.785
Intercept 9.105
Standard deviation in intercept 0.813
The results obtained indicate the following vapour pressure relationship:
Log10 (Vp (Pa)) = -4.408.658/temp(K) + 9.105.
The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of -5.682.
Run 3:
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapour Pressure (Pa) |
Log10 Vp |
181 |
454.15 |
0.002201916 |
168.99 |
1.690E-07 |
0.234601415 |
-0.629669373 |
182 |
455.15 |
0.002197078 |
172.00 |
1.720E-07 |
0.238780066 |
-0.622001932 |
183 |
456.15 |
0.002192261 |
180.14 |
1.801E-07 |
0.250080472 |
-0.601920220 |
184 |
457.15 |
0.002187466 |
202.60 |
2.026E-07 |
0.281260706 |
-0.550890938 |
185 |
458.15 |
0.002182691 |
207.15 |
2.072E-07 |
0.287577272 |
-0.541245441 |
186 |
459.15 |
0.002177937 |
215.78 |
2.158E-07 |
0.299557923 |
-0.523519190 |
187 |
460.15 |
0.002173204 |
218.95 |
2.190E-07 |
0.303958695 |
-0.517185429 |
188 |
461.15 |
0.002168492 |
230.59 |
2.306E-07 |
0.320117997 |
-0.494689909 |
189 |
462.15 |
0.002163800 |
243.04 |
2.430E-07 |
0.337401786 |
-0.471852622 |
A plot of Log10 (vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 3 (Figure 6.4) gives the following statistical data using an unweighted least squares treatment.
Slope -4234.395
Standard deviation in slope 294.509
Intercept 8.692
Standard deviation in intercept 0.643
The results obtained indicate the following vapour pressure relationship:
Log10 (Vp (Pa)) = -4234.395/temp(K) + 8.692.
The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of -5.510.
Run 4:
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapour Pressure (Pa) |
Log10 Vp |
181 |
454.15 |
0.002201916 |
153.94 |
1.539E-07 |
0.213708159 |
-0.670178897 |
182 |
455.15 |
0.002197078 |
159.72 |
1.597E-07 |
0.221732280 |
-0.654171077 |
183 |
456.15 |
0.002192261 |
166.63 |
1.666E-07 |
0.231325130 |
-0.635777184 |
184 |
457.15 |
0.002187466 |
173.39 |
1.734E-07 |
0.240709742 |
-0.618506332 |
185 |
458.15 |
0.002182691 |
180.14 |
1.801E-07 |
0.250080472 |
-0.601920220 |
186 |
459.15 |
0.002177937 |
188.44 |
1.884E-07 |
0.261602998 |
-0.582357283 |
187 |
460.15 |
0.002173204 |
192.43 |
1.924E-07 |
0.267142140 |
-0.573257599 |
188 |
461.15 |
0.002168492 |
206.99 |
2.070E-07 |
0.287355151 |
-0.541581014 |
A plot of Log10 (vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 4 (Figure 6.5) gives the following statistical data using an unweighted least squares treatment.
Slope -3693.440
Standard deviation in slope 136.406
Intercept 7.461
Standard deviation in intercept 0.298
The results obtained indicate the following vapour pressure relationship:
Log10 (Vp (Pa)) = -3693.440/temp(K) + 7.461.
The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of -4.927.
Run 5:
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapour Pressure (Pa) |
Log10 Vp |
181 |
454.15 |
0.002201916 |
143.61 |
1.436E-07 |
0.199367473 |
-0.700345697 |
182 |
455.15 |
0.002197078 |
152.72 |
1.527E-07 |
0.212014487 |
-0.673634463 |
183 |
456.15 |
0.002192261 |
163.14 |
1.631E-07 |
0.226480116 |
-0.644969921 |
184 |
457.15 |
0.002187466 |
174.36 |
1.744E-07 |
0.242056351 |
-0.616083518 |
185 |
458.15 |
0.002182691 |
162.97 |
1.630E-07 |
0.226244113 |
-0.645422713 |
186 |
459.15 |
0.002177937 |
185.10 |
1.851E-07 |
0.256966222 |
-0.590123960 |
187 |
460.15 |
0.002173204 |
191.86 |
1.919E-07 |
0.266350834 |
-0.574545939 |
188 |
461.15 |
0.002168492 |
209.60 |
2.096E-07 |
0.290978499 |
-0.536139100 |
189 |
462.15 |
0.002163800 |
215.62 |
2.156E-07 |
0.299335802 |
-0.523841337 |
190 |
463.15 |
0.002159128 |
221.39 |
2.214E-07 |
0.307346040 |
-0.512372378 |
A plot of Log10 (vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 5 (Figure 6.6) gives the following statistical data using an unweighted least squares treatment.
Slope -4416.055
Standard deviation in slope 341.863
Intercept 9.027
Standard deviation in intercept 0.745
The results obtained indicate the following vapour pressure relationship:
Log10 (Vp (Pa)) = -4416.055/temp(K) + 9.027.
The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of -5.785.
Summary of Results:
Run |
Log10 [Vp(25ºC)] |
1 |
-5.397 |
2 |
-5.682 |
3 |
-5.510 |
4 |
-4.927 |
5 |
-5.785 |
Mean |
-5.460 |
Vapour Pressure |
3.5 x 10-6 Pa |
The test item did not change in appearance under the conditions used in the determination.
Applicant's summary and conclusion
- Conclusions:
The vapour pressure of the test item has been determined to be 3.5 x 10-6 Pa at 25ºC.- Executive summary:
The vapour pressure of SLI(76)stripped was determined in study number 2517/0001 using a vapour pressure balance with measurements being made at several temperatures and linear regression analysis used to calculate the vapour pressure at 25°C. Testing was conducted using Method A4 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC). The vapour pressure of the test item has been determined to be 3.5 x 10-6 Pa at 25ºC.
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