Registration Dossier
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EC number: 217-370-6 | CAS number: 1825-62-3
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 11-Apr-2005
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- BAYERISCHES LANDESAMT FUR ARBEITSSCHUTZ, ARBEITSMEDIZIN UND SICHERHEITSTECHNIK
- Type of method:
- dynamic method
- Temp.:
- 20 °C
- Vapour pressure:
- 12.9 hPa
- Temp.:
- 25 °C
- Vapour pressure:
- 19 hPa
- Conclusions:
- A vapour pressure of 12.9 hPa at 20°C and 19.0 hPa at 25 °C was determined in a reliable study conducted according to an appropriate test protocol, and in compliance with GLP.
Reference
Results
Estimated vapour pressure: 12.9 hPa at 20 °C
19.0 hPa at 25 °C
Formula of regression: Iog p [hPa] = -2905.76 × 1/T [1/K] + 11.02367
Raw data:
Data point |
Boiling temperature T (°C) |
Vapour pressure P (hPa) |
1. |
7 |
4.2 |
2. |
19 |
12 |
3. |
30 |
30 |
4. |
49 |
102 |
5. |
65 |
263 |
6. |
61 |
202 |
7. |
56 |
156 |
8. |
43 |
71 |
9. |
25 |
19 |
10. |
14 |
8 |
Conversion of the raw data:
Data point |
T [K] |
1/T [1/K] |
log p [hPa] |
1. |
280.15 |
0.003570 |
0.62325 |
2. |
292.15 |
0.003423 |
1.07918 |
3. |
303.15 |
0.003299 |
1.47712 |
4. |
322.15 |
0.003104 |
2.00860 |
5. |
338.15 |
0.002957 |
2.41996 |
6. |
334.15 |
0.002993 |
2.30535 |
7. |
329.15 |
0.003038 |
2.19312 |
8. |
316.15 |
0.003163 |
1.85126 |
9. |
298.15 |
0.003354 |
1.27875 |
10. |
287.15 |
0.003483 |
0.90309 |
Transition (change of state, decomposition) during measurement:
Observation of a transition: No
Description of key information
Trimethylsilanol: 19 hPa at 25°C (Dynamic method, OECD 104)
Key value for chemical safety assessment
- Vapour pressure:
- 19 hPa
- at the temperature of:
- 25 °C
Additional information
For the silanol hydrolysis product vapour pressure values of 12.9 hPa at 20°C and 19 hPa at 25°C were determined by dynamic method according to OECD 104, EU Method A.4.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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