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EC number: 443-870-0 | CAS number: 163520-33-0
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Senatsverwaltung für Gesundheit, Berlin
- Type of method:
- effusion method: vapour pressure balance
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: extrapolated value
Reference
The temperature dependence on the basis of the experimental data fits to the equation:
log P = 6808*(1 /T) + 17.57
t [°C] |
P(Pa) |
95 % CI |
20* |
2.2 ·10-6 |
9.3 ·10-7- 5.1 ·10-6 |
25* |
5.5 ·10-6 |
2.5 ·10-6- 1.2 ·10-5 |
30* |
1.3 ·10-5 |
6.3 ·10-6- 2.6 ·10-5 |
66 |
2.9 ·10-3 |
2.1 · 10- 3- 4.5 ·10-3 |
75 |
1.08 ·10-2 |
7 ·10-3 - 1.5 ·10-2 |
94* |
0.105 |
6.8 ·10-2- 0.16 |
104* |
0.32 |
0.196 - 0.53 |
*) - extrapolated values of vapour pressure
t - temperature (°C)
p - vapour pressure (Pa)
95% CI - 95 % confidence interval
The good agreement of the experiments at different temperatures provides evidence that the samples being measured are sufficiently pure. They are not decomposing in the respective range of temperatures.
Description of key information
0.0000022 Pa at 20 °C
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
OECD Guideline 104 (Vapour Pressure Curve); effusion method (vapour pressure balance)
- value estimated according to the Antoine equation
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