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EC number: 216-613-3 | CAS number: 1624-62-0
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Type of method:
- effusion method: vapour pressure balance
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Temp.:
- 30 °C
- Vapour pressure:
- 0 Pa
- Conclusions:
- The vapour pressure of Estron-Methylether at 25 °C was determined as 1.1E-5Pa.
- Executive summary:
A study was conducted in accordance to guidance A.4 of the European Community to determine the vapour pressure of Estron-Methylether.
The vapour pressure of the test item was measured with a vapour pressure balance corresponding to the Knudsen effusion method. For measurement, the vapour jet of the test substance leaving a heatable Knudsen cell through an aperture of known size under high vacuum conditions is condensed on the cooled scale pan of a precision Cahn-microbalance. The evaporation rate is determined from the increase in weight per unit time from which the vapour pressure is calculated.
The temperature dependence of the vapour pressure was calculated from a regression straight line which is based on the Antoine relationship. The vapour pressure of Estron-Methylether at 25 °C was determined as 1.1E-5Pa.
Reference
The temperature dependence of the vapour pressure was calculated from a regression straight line which is based on the Antoine relationship.
Description of key information
A study was conducted in accordance to guidance A.4 of the European Community to determine the vapour pressure of Estron-Methylether.
The vapour pressure of the test item was measured with a vapour pressure balance corresponding to the Knudsen effusion method. For measurement, the vapour jet of the test substance leaving a heatable Knudsen cell through an aperture of known size under high vacuum conditions is condensed on the cooled scale pan of a precision Cahn-microbalance. The evaporation rate is determined from the increase in weight per unit time from which the vapour pressure is calculated.
The temperature dependence of the vapour pressure was calculated from a regression straight line which is based on the Antoine relationship. The vapour pressure of Estron-Methylether at 25 °C was determined as 1.1E-5Pa.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
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