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EC number: 271-672-2 | CAS number: 68603-74-7
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 31 August 2018 - ****
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Justification for type of information:
- Updated information. Study now available and provided ahead of extended submission date of 31/05/2019.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: isothermal thermogravimetry
Test material
- Reference substance name:
- Amines, N-tallow alkyltrimethylenedi-, C4-18-alkyl phosphates
- EC Number:
- 271-672-2
- EC Name:
- Amines, N-tallow alkyltrimethylenedi-, C4-18-alkyl phosphates
- Cas Number:
- 68603-74-7
- Molecular formula:
- The substance is a UVCB so there is no molecular formula
- IUPAC Name:
- Amines, N-tallow alkyltrimethylenedi-, C4-18-alkyl phosphates
- Test material form:
- solid
Constituent 1
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Expiration date of the lot/batch: 30 April 2019
- Purity test date: Not specified
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: At room temperature
- Stability under test conditions: Stable at a maximum of 50°C
Results and discussion
Vapour pressureopen allclose all
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- <= 0 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- <= 0 Pa
Any other information on results incl. tables
The log p versus 1/T curve constructed from a representative weight loss curve of the test item in the range of 30°C - 60°C had a coefficient of correlation (r) of < 0.99. It is therefore not possible to calculate an accurate vapour pressure.
As an alternative, the weight losses of the test item were compared with the results of naphthalene at the same temperatures. Since the weight loss of the test item was lower than the weight loss of the reference compound, the vapour pressure of the test item is considered to be below the vapour pressure of naphthalene. However, in order to obtain a more accurate vapour pressure, it was decided to determine weight loss at temperatures above the melting point of the test item. The results of the isothermal TGA analysis for the test item and the vapour pressure at 20°C and 25°Care given in the table below:
Temperature °C |
LogPT | PT | PT |
| 20 | -4.01 | 9.9 x 10 -5 | 7.4 x 10 -7 |
| 25 | -3.71 | 2.0 x 10 -4 | 1.5 x 10 -6 |
In practice weight losses of the test item were obtained at temperatures above the melting temperature of the test item. According to this, the vapour pressure of the test item (which was, according to the method, extrapolated to 20°C and 25°C) could be slightly overestimated and has therefore to be reported as an equal to or less than value.
Applicant's summary and conclusion
- Conclusions:
- The isothermal TGA effusion method was applied for the determination of the vapour pressure of Amines, N-tallow alkyltrimethylenedi-, C4-18-alkyl phosphates.
The weight losses of the test item were obtained at temperatures above the melting temperature of the test item. According to this, the vapour pressure of the test item (which was, according to the method, extrapolated to 20°C and 25°C) could be slightly overestimated and is therefore reported as an equal to or less than value.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was: = 9.9 x 10^-5 and = 2.0 x 10^-4 repectively. - Executive summary:
Introduction
The vapour pressure of the test item was determined using a method designed to meet the requirements of the following guidelines:
- EC Guideline A.4. Vapour Pressure. March 04, 2016.
- OECD Guideline104. Vapour Pressure. March 23, 2006.
- EPA Product Properties Test Guideline OPPTS 830.7950: Vapor pressure. August 1996.
Method
The vapour pressure of the test item was determined by the isothermal thermogravimetric effusion method.
Results and Conclusion
The weight losses of the test item were obtained at temperatures above the melting temperature of the test item. According to this, the vapour pressure of the test item (which was, according to the method, extrapolated to 20°C and 25°C) could be slightly overestimated and is therefore reported as an equal to or less than value.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was: = 9.9 x 10 -5 and = 2.0 x 10-4 repectively.
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