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EC number: 608-659-1 | CAS number: 31692-85-0
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 25-26 Oct 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- GLP compliance:
- no
- Type of method:
- dynamic method
- Remarks:
- Vapour-liquid equilibrium (VLE)
Test material
- Reference substance name:
- 2-[(oxolan-2-yl)methoxy]ethan-1-ol
- EC Number:
- 608-659-1
- Cas Number:
- 31692-85-0
- Molecular formula:
- C5H10O2[C2H4O]n, n = 0, 1, 2, 3, 4, ... (data given for max n of 4)
- IUPAC Name:
- 2-[(oxolan-2-yl)methoxy]ethan-1-ol
- Test material form:
- liquid
Constituent 1
Results and discussion
Vapour pressureopen allclose all
- Temp.:
- 20 °C
- Vapour pressure:
- 4.97 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 7.15 Pa
- Temp.:
- 50 °C
- Vapour pressure:
- 37.4 Pa
Any other information on results incl. tables
Thermal stability:
The test item showed a very small endothermic effect,directly followed by a small exothermic effect in the temperature range of 115 - 150 °C. No further effects could be observed up to 300 °C.
Sample weight / mg |
Start of effect / °C |
Energy / J/g |
7.85 |
110 (endothermic) 115 (exothermic) |
<10 -20 |
Dynamic method:
The vapour pressure was measured in the temperature range of 119.8 to 154.6 °C. The values are listed in the table below.
No. |
Temperature / °C |
Vapour pressure / hPa |
Remark |
1 |
119.8 |
11.4 |
measured up |
2 |
128.8 |
20.1 |
measured up |
3 |
145.9 |
34.8 |
measured up |
4 |
156.3 |
49.8 |
measured up |
5 |
159.9 |
59.5 |
measured up |
6 |
166.1 |
69.0 |
measured up |
7 |
164.8 |
64.4 |
measured down |
8 |
160.1 |
54.4 |
measured down |
9 |
154.6 |
44.9 |
measured down |
On the basis of those data, the constants A, B, C of the Antoine equation pressure vs temperature:
log P = A + B/(C + T)
were derived by regression: A = 10.1454, B = -2770.10, C = 273.15.
Applicant's summary and conclusion
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