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EC number: 471-980-9 | CAS number: 1016986-95-0
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Testing was conducted between 20th September and 11th October 2005
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Meets the criteria for classification as Reliable without restriction according to Klimisch et al (1997)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 006
- Report date:
- 2006
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: 92/69/EEC A4 (vapour pressure balance method)
- GLP compliance:
- yes
- Type of method:
- effusion method: vapour pressure balance
Test material
- Reference substance name:
- -
- EC Number:
- 471-980-9
- EC Name:
- -
- Cas Number:
- 1016986-95-0
- Molecular formula:
- Hill formula: C42 H24 Lim N9 Nan O15 S6 m+n=5 3=
- IUPAC Name:
- 7-{2-[2-(2-{5-cyano-4-methyl-2,6-bis[(4-sulfophenyl)amino]pyridin-3-yl}diazen-1-yl)-4-(naphthalen-2-yl)-1,3-thiazol-5-yl]diazen-1-yl}naphthalene-1,3,5-trisulfonic acid trilithium hydride disodium hydride
- Test material form:
- solid: particulate/powder
- Remarks:
- migrated information: powder
Constituent 1
Results and discussion
Vapour pressure
- Temp.:
- 25 °C
- Vapour pressure:
- < 0 Pa
- Remarks on result:
- other: First vapour pressure
Any other information on results incl. tables
Run 1
|
Run 2
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Run 3
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Run 4
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Run 5
|
Run 6
|
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°C. Run 6 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 248°C (521.15 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 25°C gave a vapour pressure of 7.129 x 10-6 Pa which has been taken as a maximum for the test 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 7.2 x10-6 Pa at 25 "C.
- Executive summary:
Introduction:
The Vapour Pressure was measured using EC method 92/69/EEC A4 (vapour pressure balance method)
Results and Conclusions:
The vapour pressure of the test material was determined to be less than 7.2 x 10-6 Pa at 25 °C.
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