Registration Dossier
Registration Dossier
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EC number: 416-740-6 | CAS number: -
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:
- 1994
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Reliability rating is 1 because the data were determined using standard 92/69/EEC Method A4 vapor pressure and was carried out under GLP.
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Principles of method if other than guideline:
- Effusion method: isothermal thermogravimetry using a vapor pressure balance. The method is based on the determination of accelerated evaporation rates for the test substance at elevated temperatures and ambient pressure using thermogravimetry. The evaporation rates vT result from exposing the selected compound to a slowly flowing inert gas atmosphere, and monitoring the weight loss at defined isothermal temperatures T in Kelvin over appropriate periods of time. The vapour pressures pT are estimated from the vT values by using the linear relationship between the logarithm of the vapour pressure and the logarithm of the evaporation rate. An extrapolation to temperatures of 25°C can be made by regression analysis of log pT vs. 1/T.
- GLP compliance:
- yes
- Type of method:
- effusion method: vapour pressure balance
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: The vapor pressure of the test substance was estimated to be 4.2 x 10-4 Pa at 25°C.
- Conclusions:
- The vapor pressure of the test substance was estimated to be 4.2 x 10-4 Pa at 25°C. The vapor pressure balance or effusion method is an acceptable method for substances with a relatively low vapor pressure.
- Executive summary:
The vapor pressure of the test substance was estimated to be 4.2 x 10-4 Pa at 25°C.
Reference
Description of key information
The vapor pressure of the test substance was estimated to be 4.2 x 10-4 Pa at 25°C. The vapor pressure balance or effusion method is an acceptable method for substances with a relatively low vapor pressure.
Key value for chemical safety assessment
Additional information
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