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EC number: 700-174-4 | CAS number: 1029600-34-7
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 08 April 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 affcet 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:
- Date of inspection: 21/08/07 Date of signature: 15/10/07
- Type of method:
- effusion method: vapour pressure balance
Test material
- Reference substance name:
- Reaction mass of :Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(Z)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)Sodium or ammonium [3-{(E)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][1-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)Sodium or ammonium [3-{(E)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][1-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)
- EC Number:
- 700-174-4
- Cas Number:
- 1029600-34-7
- Molecular formula:
- See structure.
- IUPAC Name:
- Reaction mass of :Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(Z)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)Sodium or ammonium [3-{(E)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][1-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)Sodium or ammonium [3-{(E)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][1-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)
- Reference substance name:
- Reaction mass of : Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(Z)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-) Sodium or ammonium [3-{(E)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][1-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-) Sodium or ammonium [3-{(E)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][1-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-) Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-) Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-) Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)
- IUPAC Name:
- Reaction mass of : Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(Z)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-) Sodium or ammonium [3-{(E)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][1-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-) Sodium or ammonium [3-{(E)-[2-(hydroxy-kO)-5-(2-methylbutan-2-yl)-3-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][1-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-) Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-) Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-) Sodium or ammonium [1-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO][3-{(E)-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl}naphthalen-2-olato(2-)-kO]chromate(1-)
- Details on test material:
- Sponsor's identification : VCBK3810
Description : black powder
Batch number : N006746
Date received : 25 February 2008
Storage conditions : room temperature in the dark
Constituent 1
Constituent 2
Results and discussion
Vapour pressure
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
Any other information on results incl. tables
Results:
Run1
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapour Pressure (Pa) |
Log10Vp |
185 |
458.15 |
0.002182691 |
6.43 |
6.430E-09 |
0.008926487 |
-2.049319406 |
186 |
459.15 |
0.002177937 |
6.43 |
6.430E-09 |
0.008926487 |
-2.049319406 |
187 |
460.15 |
0.002173204 |
5.86 |
5.860E-09 |
0.008135181 |
-2.089632763 |
188 |
461.15 |
0.002168492 |
7.24 |
7.240E-09 |
0.010050975 |
-1.997791813 |
189 |
462.15 |
0.002163800 |
7.08 |
7.080E-09 |
0.009828854 |
-2.007497121 |
190 |
463.15 |
0.002159128 |
7.16 |
7.160E-09 |
0.009939914 |
-2.002617356 |
191 |
464.15 |
0.002154476 |
9.36 |
9.360E-09 |
0.012994078 |
-1.886254530 |
192 |
465.15 |
0.002149844 |
8.38 |
8.380E-09 |
0.011633587 |
-1.934286360 |
193 |
466.15 |
0.002145232 |
11.07 |
1.107E-08 |
0.015367996 |
-1.813382758 |
194 |
467.15 |
0.002140640 |
12.69 |
1.269E-08 |
0.017616971 |
-1.754068757 |
195 |
468.15 |
0.002136067 |
12.53 |
1.253E-08 |
0.017394850 |
-1.759579308 |
No statistical analysis is given due to the nature of the plot
Run 2
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapour Pressure (Pa) |
Log10Vp |
185 |
458.15 |
0.002182691 |
6.02 |
6.020E-09 |
0.008357302 |
-2.077933887 |
186 |
459.15 |
0.002177937 |
6.51 |
6.510E-09 |
0.009037548 |
-2.043949390 |
187 |
460.15 |
0.002173204 |
6.02 |
6.020E-09 |
0.008357302 |
-2.077933887 |
188 |
461.15 |
0.002168492 |
5.78 |
5.780E-09 |
0.008024121 |
-2.095602540 |
189 |
462.15 |
0.002163800 |
6.83 |
6.830E-09 |
0.009481790 |
-2.023109675 |
190 |
463.15 |
0.002159128 |
9.28 |
9.280E-09 |
0.012883018 |
-1.889982403 |
191 |
464.15 |
0.002154476 |
7.49 |
7.490E-09 |
0.010398039 |
-1.983048561 |
192 |
465.15 |
0.002149844 |
9.19 |
9.190E-09 |
0.012758074 |
-1.894214867 |
193 |
466.15 |
0.002145232 |
9.03 |
9.030E-09 |
0.012535953 |
-1.901842628 |
194 |
467.15 |
0.002140640 |
9.11 |
9.110E-09 |
0.012647014 |
-1.898012002 |
195 |
468.15 |
0.002136067 |
11.88 |
1.188E-08 |
0.016492484 |
-1.782713938 |
No statistical analysis is given due to the nature of the plot
Run 3:
Temperature (ºC) |
Temperature (K) |
Reciprocal Temperature (K-1) |
Mass Difference (µg) |
Mass Difference (kg) |
Vapour Pressure (Pa) |
Log10Vp |
185 |
458.15 |
0.002182691 |
5.78 |
5.780E-09 |
0.008024121 |
-2.095602540 |
186 |
459.15 |
0.002177937 |
6.51 |
6.510E-09 |
0.009037548 |
-2.043949390 |
187 |
460.15 |
0.002173204 |
5.53 |
5.530E-09 |
0.007677057 |
-2.114805247 |
188 |
461.15 |
0.002168492 |
5.78 |
5.780E-09 |
0.008024121 |
-2.095602540 |
189 |
462.15 |
0.002163800 |
7.73 |
7.730E-09 |
0.010731220 |
-1.969350885 |
190 |
463.15 |
0.002159128 |
7.24 |
7.240E-09 |
0.010050975 |
-1.997791813 |
191 |
464.15 |
0.002154476 |
7.57 |
7.570E-09 |
0.010509099 |
-1.978434499 |
192 |
465.15 |
0.002149844 |
8.87 |
8.870E-09 |
0.012313832 |
-1.909606759 |
193 |
466.15 |
0.002145232 |
10.98 |
1.098E-08 |
0.015243053 |
-1.816928039 |
194 |
467.15 |
0.002140640 |
9.03 |
9.030E-09 |
0.012535953 |
-1.901842628 |
195 |
468.15 |
0.002136067 |
11.07 |
1.107E-08 |
0.015367996 |
-1.813382758 |
No statistical analysis is given due to the nature of the plot.
Discussion:
No statistical analyses were performed because the balance readings were too low and variable for a line of best fit to have any meaning. Instead it was considered more appropriate to impose a regression slope on a chosen data point to provide an estimate of the maximum value for the vapour pressure at 25 ºC.
Run 3 was chosen because the sample had been under vacuum for the longest period prior to this run and so degassing would have been the most complete. The reading at 193 ºC (466.15 K) was chosen because this is the data point which gives the highest estimated vapour pressure at any given temperature when a slope of –1500 K is imposed upon it.
The value of –1500 K is an in-house value and is the shallowest slope observed whilst determining the vapour pressure on a wide range of samples using the vapour pressure balance method. Extrapolation to 25ºC gave a vapour pressure of 2.344 x 10 -4 Pa which has been taken as a maximum for this material.
The test material did not change in appearance under the conditions used in the determination.
Applicant's summary and conclusion
- Conclusions:
- The vapour pressure of the test material has been determined to be less than 2.4 x 10E-4 Pa at 25ºC. The vapour pressure balance method was used based on a low vapour pressure.
- Executive summary:
The vapour pressure was determined 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 material has been determined to be less than 2.4 x 10-4 Pa at 25ºC.
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