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EC number: 610-161-4 | CAS number: 4403-36-5
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:
- 2018-06-27 to 2018-10-09
- 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)
- Version / remarks:
- 1981
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: Knudsen cell
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Key result
- Temp.:
- 50 °C
- Vapour pressure:
- 0 Pa
- Key result
- Vapour pressure:
- 0 Pa
- Conclusions:
- The vapour pressure of the test item TA-2 was calculated for the temperatures 20, 25 and 50 °C by extrapolation of the measured vapour pressure curve, according to Regulation EC No. 440/2008 Method A.4.Vapour Pressure and OECD Test Guideline 104 (2006).
Reference
The vapour pressure was measured in the temperature range of 120.9 °C to 140.9 °C. The measured vapour pressure values together with the measured temperatures are listed in Table 1:
Results of the Effusion method
No. |
Temperature / °C |
Vapour pressure / Pa |
1 |
120.9 |
0.42 |
2 |
126.0 |
0.76 |
3 |
131.0 |
1.39 |
4 |
135.9 |
2.59 |
5 |
140.9 |
4.29 |
The measured vapour pressures in the temperature range of 131.0 – 140.9 °C are slightly outside the measuring range (10-3to 1 Pa) of the Knudsen cell. Nevertheless, as the vapour pressure value above 1 Pa could be detected properly by the Knudsen cell, this value can be used for the evaluation.
From the measured data points of the vapour pressure curve the constants A and B of the Antoine equation
log10p = A + B/T = A + B/C + υ
can be derived by regression of the data points to
A = 20.7678
B = -8333.56
C = 273.15.
Description of key information
The vapour pressure of the test item TA-2 was calculated for the temperatures 20, 25 and 50 °C by extrapolation of the measured vapour pressure curve, according to Regulation EC No. 440/2008 Method A.4.Vapour Pressure and OECD Test Guideline 104 (2006). At 25°C the test item exhibits a vapour pressure of 6.6E-8 Pa.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °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.
