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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
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.
