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EC number: 214-333-6 | CAS number: 1121-60-4
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:
- 2018-03-28 to 2018-04-03s
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Version / remarks:
- 1996
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Guideline 113 (Thermal Stability)
- Version / remarks:
- 1981
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: vapour pressure balance
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.73 hPa
- Temp.:
- 25 °C
- Vapour pressure:
- 1.05 hPa
- Temp.:
- 50 °C
- Vapour pressure:
- 5.63 hPa
- Conclusions:
- The vapour pressure of the test item was calculated to be 0.73 at 20°C, 1.05 at 25°C and 5.63 hPa at 50°C, by extrapolation of the measured vapour pressure curve by Vapour-Liquid equilibrium (VLE) according to Regulation EC No. 440/2008 Method A.4.Vapour Pressure and OECD guideline 104.
Reference
Thermal stability:
Up to 260 °C neither an endothermic nor an exothermic effect was observed. At 260 °C the start of an exothermic effect which can be assigned to a decomposition of the test item was observed. This effect was not completed at a temperature of 300 °C at which the DSC run was stopped.
Table1: Results of the DSC-measurement
No. |
Sample weight / mg |
Start / °C |
Specific energy / J/g |
PN15313 |
13.49 |
260 (exothermic) |
> -29 |
Table2: Results of the dynamic method . The vapour pressure was measured in the temperature range of 62 °C to 129 °C.
The test item changed its colour from brownish yellow to brown.
No. |
Temperature / °C |
Vapour pressure / hPa |
Remark |
1 |
61.9 |
10.9 |
measured up |
2 |
72.3 |
20.1 |
measured up |
3 |
83.5 |
39.8 |
measured up |
4 |
99.0 |
79.8 |
measured up |
5 |
114.1 |
149.8 |
measured up |
6 |
129.1 |
299.1 |
measured up |
7 |
122.3 |
200.3 |
measured down |
8 |
104.5 |
99.9 |
measured down |
9 |
92.5 |
59.8 |
measured down |
From the measured data points of the vapour pressure curve the constants A, B and C of the Antoine
equation
log10p = A + ( B / (C + T) )
can be derived by regression (Microsoft Excel) of the data points to
A =11.4276
B =-2803.94
C =273.15
Description of key information
The vapour pressure of the substance was calculated to be 0.73 hPa at 20°C. It was determined in a reliable study conducted according to an appropriate standard test method (OECD 104).
Key value for chemical safety assessment
- Vapour pressure:
- 0.73 hPa
- at the temperature of:
- 20 °C
Additional information
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
