Registration Dossier
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EC number: 928-726-1 | CAS number: 1179913-28-0
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- GLP compliance:
- not specified
- Type of method:
- effusion method: Knudsen cell
- Specific details on test material used for the study:
- Batch no.: #210162718
Composition: Reaction products of linseed-oil fatty acids, 4,4'-methylendiphenyldiglycidylether with neodecanoic fatty acid, oxiranylmethylester
Purity: 100 % as per definition of UVCB - Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.001 Pa
- Remarks on result:
- other: calculated from the regression equation
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0.002 Pa
- Remarks on result:
- other: calculated from the regression equation
- Temp.:
- 30 °C
- Vapour pressure:
- 0.002 Pa
- Temp.:
- 45 °C
- Vapour pressure:
- 0.005 Pa
- Temp.:
- 60 °C
- Vapour pressure:
- 0.011 Pa
- Conclusions:
- Under the study conditions, the vapour pressure of the test substance was determined to be 1.37E-03 and 1.83E-03 Pa at 20 and 25°C, respectively.
- Executive summary:
A study was conducted to determine the vapour pressure of the test substance according to OECD Guideline 104 and EU Method A.4. The vapour pressure of the test substance was determined by the Knudsen cell effusion method. The test substance was weighed into the 4 Knudsen cells, which were set into vacuum chamber at 10-05 Pa or lower followed by measurements at 30, 45, 60 and 75 °C. The test substance colour became darker at 75 °C, hence the measurements at this temperature were not used for calculations. The measured values for temperature and vapour pressure were evaluated as follows: 2.43E-03, 5.43E-03 and 1.11E-02 at 30, 45, and 60°C, respectively. Under the study conditions, the vapour pressures of the test substance were determined (by calculation) to be 1.37E-03 and 1.83E-03 Pa at 20 and 25°C, respectively (Henke, 2016).
Reference
- The measured values for temperature and vapour pressure were evaluated as follows:
| Parameter | T | P | 1/T | log P |
| Unit | K | Pa | 1/K | log Pa |
| Value | 303.2 | 2.43E-03 | 3.2982E-03 | -2.6144 |
| Value | 318.2 | 5.43E-03 | 3.1427E-03 | -2.2653 |
| Value | 333.2 | 1.11E-02 | 3.0012E-03 | -1.9555 |
T: Temperature (K) = 273.15 + t (°C)
- For the test substance, the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:
Vapour pressure at 20 °C: 1.37E-03 Pa
Vapour pressure at 25 °C: 1.83E-03 Pa
Description of key information
The vapour pressure was determined according to OECD Guideline 104 and EU Method A.4 (effusion method: Knudsen cell) (Henke, 2016).
Key value for chemical safety assessment
- Vapour pressure:
- 0.011 Pa
- at the temperature of:
- 60 °C
Additional information
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