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EC number: 233-937-0 | CAS number: 10450-60-9
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:
- 16 March 2018 to 11 December 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- 2016
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2016
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Version / remarks:
- 1996
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- effusion method: isothermal thermogravimetry
- Temp.:
- 20 °C
- Vapour pressure:
- < 7.6 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- < 12 Pa
- Conclusions:
- Under the conditions of the test the vapour pressure of the test material at 20 °C (293K) was < 7.6 Pa and at 25 °C (298K) was < 12 Pa.
- Executive summary:
The vapour of the test material was assessed according to EC Guideline A.4., OECD Guideline 104 and EPA Guideline OPPTS 830.7950 in accordance with the principles of GLP using isothermal thermogravimetry effusion method.
Weight loss in the range of 50°C and 80 °Cwas not reliable for the determination of the vapour pressure because the coefficient of correlation R < 0.99 (i.e. 0.96). From 90°Cupwardsnon-linear weight loss was observed, indicating reaction and/or decomposition. Since no reliable vapour pressure could be calculated from the results obtained in the range of 50°C and 80 °C, the weight losses were compared with the results of naphthalene. Since theweight loss of the test material was lower than the weight loss of the reference compound the vapour pressure of the test material is considered to belower than that ofnaphthalene.
Under the conditions of the test the vapour pressure of the test material at 20 °C (293K) was < 7.6 Pa and at 25 °C (298K) was < 12 Pa.
Reference
Results of the Vapour Pressure Isothermal TGA Analysis
Temperature |
Weight loss |
νT |
log νT |
log PT |
PT |
50 |
0.232859 |
2.78 x 10^-5 |
-4.56 |
-0.69 |
0.20 |
|
0.396509 |
4.73 x 10^-5 |
-4.32 |
-0.40 |
0.40 |
60 |
0.489715 |
5.85 x 10^-5 |
-4.23 |
-0.28 |
0.52 |
|
0.481525 |
5.75 x 10^-5 |
-4.24 |
-0.29 |
0.51 |
70 |
6.14586 |
7.34 x 10^-4 |
-3.13 |
1.12 |
13 |
|
6.98163 |
8.33 x 10^-4 |
-3.08 |
1.20 |
16 |
80 |
18.5599 |
2.22 x 10^-3 |
-2.65 |
1.74 |
55 |
|
15.9101 |
1.90 x 10^-3 |
-2.72 |
1.65 |
45 |
Weight loss in the range of 50 °C and 80 °C was not reliable for the determination of the vapour pressure because the coefficient of correlation R < 0.99 (i.e. 0.96). From 90 °C upwards non-linear weight loss was observed, indicating reaction and/or decomposition.
Since no reliable vapour pressure could be calculated from the results obtained in the range of 50 °C and 80 °C, the weight losses were compared with the results of naphthalene. Since the weight loss of the test material was lower than the weight loss of the reference compound the vapour pressure of the test material is considered to be lower than that of naphthalene.
Vapour Pressure of the Test Material
|
20 °C |
25 °C |
||
|
[Pa] |
[mm Hg] |
[Pa] |
[mm Hg] |
Test material |
< 7.6 |
< 5.7 x 10^-2 |
< 12 |
< 8.6 x 10^-2 |
Description of key information
Under the conditions of the test the vapour pressure of the test material at 20 °C (293K) was < 7.6 Pa and at 25 °C (298K) was < 12 Pa.
Key value for chemical safety assessment
- Vapour pressure:
- 7.6 Pa
- at the temperature of:
- 25 °C
Additional information
The vapour of the test material was assessed according to EC Guideline A.4., OECD Guideline 104 and EPA Guideline OPPTS 830.7950 in accordance with the principles of GLP using isothermal thermogravimetry effusion method. The study was assigned a reliability score of 1 in accordance with the principles for assessing data quality as outlined by Klimisch et al. (1997).
Weight loss in the range of 50°C and 80 °Cwas not reliable for the determination of the vapour pressure because the coefficient of correlation R < 0.99 (i.e. 0.96). From 90°Cupwardsnon-linear weight loss was observed, indicating reaction and/or decomposition. Since no reliable vapour pressure could be calculated from the results obtained in the range of 50°C and 80 °C, the weight losses were compared with the results of naphthalene. Since theweight loss of the test material was lower than the weight loss of the reference compound the vapour pressure of the test material is considered to belower than that ofnaphthalene.
Under the conditions of the test the vapour pressure of the test material at 20 °C (293K) was < 7.6 Pa and at 25 °C (298K) was < 12 Pa.
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