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EC number: 807-413-2 | CAS number: 70280-68-1
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 02 March 2015-19 June 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP-compliant study in accordance with EC A.4, OECD 104 and EPA OPPTS 830.7950.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 015
- Report date:
- 2015
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- (2009)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- (2006)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Version / remarks:
- (1996)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- other: Effusion method: isothermal thermogravimetry
Test material
- Reference substance name:
- 3-[3-(1,1,1,3,5,5,5-heptamethyltrisiloxan-3-yl)propoxy]propane-1,2-diol
- EC Number:
- 807-413-2
- Cas Number:
- 70280-68-1
- Molecular formula:
- C13H34O5Si3
- IUPAC Name:
- 3-[3-(1,1,1,3,5,5,5-heptamethyltrisiloxan-3-yl)propoxy]propane-1,2-diol
- Test material form:
- other: Liquid
- Details on test material:
- - Name (as cited in study report): X-22-1927
- Appearance: clear light yellow liquid
- Storage conditions: at room temperature
Constituent 1
Results and discussion
Vapour pressureopen allclose all
- Temp.:
- 20 °C
- Vapour pressure:
- 0.22 - 0.34 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 0.35 - 0.54 Pa
Any other information on results incl. tables
The log PT values of the test substance at 20°C were calculated to be -0.47, -0.63 and -0.67 for Experiment 1, 2 and 3, respectively.
The vapour pressures (PT) at 20°C were calculated to be 0.34, 0.24 and 0.22 for Experiment 1, 2 and 3, respectively.
The log PT values of the test substance at 25°C were calculated to be -0.27, -0.42 and -0.46 for Experiment 1, 2 and 3, respectively.
The vapour pressures (PT) at 25°C were calculated to be 0.54, 0.38 and 0.35 for Experiment 1, 2 and 3, respectively.
Table: Results of the isothermal TGA analysis
Experiment |
Temperature |
Weight loss |
νT |
log νT |
log PT |
PT |
|
|
|
|
|
|
|
1 |
70 |
10.69 |
1.28 E-03 |
-2.89 |
1.26 |
18 |
|
80 |
19.69 |
2.35 E-03 |
-2.63 |
1.57 |
38 |
|
90 |
32.18 |
3.84 E-03 |
-2.42 |
1.82 |
67 |
|
|
|
|
|
|
|
2 |
70 |
8.676 |
1.04 E-03 |
-2.98 |
1.16 |
14 |
|
80 |
16.45 |
1.96 E-03 |
-2.71 |
1.48 |
30 |
|
90 |
27.01 |
3.22 E-03 |
-2.49 |
1.74 |
54 |
|
|
|
|
|
|
|
3 |
70 |
8.441 |
1.01 E-03 |
-3.00 |
1.14 |
14 |
|
80 |
16.32 |
1.95 E-03 |
-2.71 |
1.48 |
30 |
|
90 |
26.74 |
3.19 E-03 |
-2.50 |
1.73 |
54 |
|
|
|
|
|
|
|
Applicant's summary and conclusion
- Conclusions:
- In a GLP-compliant study in accordance with EC A.4, OECD 104 and EPA OPPTS 830.7950 using the isothermal thermogravimetric effusion method, the vapour pressure of X-22-1927 at 25°C has been determined to be 0.35 - 0.54 Pa (0.22 - 0.34 Pa at 20°C).
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