Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 236-293-9 | CAS number: 13283-01-7
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:
- October, 1937
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- A current of hydrogen was passed over tungsten hexachloride in a glass container inside a small heating furnace. A coil immersed in liquid air was connected to the outlet of the furnace to condense the tungsten hexachloride carried over by the hydrogen. A known amount of gas was passed through the apparatus and the vapor pressure of tungsten hexachloride calculated from the increase in weight of the coil.
- GLP compliance:
- not specified
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0.005 mm Hg
- Temp.:
- 50 °C
- Vapour pressure:
- 0.026 mm Hg
- Temp.:
- 100 °C
- Vapour pressure:
- 0.1 mm Hg
- Temp.:
- 150 °C
- Vapour pressure:
- 25.1 mm Hg
- Conclusions:
- The vapour pressure of tungsten hexachloride was reported to be 0.005 mm Hg (0.67 Pa) at a temperature of 25 °C.
- Executive summary:
A current of hydrogen was passed over tungsten hexachloride in a glass container inside a small heating furnace. A coil immersed in liquid air was connected to the outlet of the furnace to condense the tungsten hexachloride carried over by the hydrogen. A known amount of gas was passed through the apparatus and the vapor pressure of tungsten hexachloride calculated from the increase in weight of the coil:
Vapour pressure of tungsten hexachloride Temperature / °C Vapour pressure / mm Hg 25 0.005 50 0.026 100 0.1 150 25.1 The results conform to a log p vs. 1/T plot with a maximum deviation of measured point from the straight line of 5%. The heat of the vaporisation calculated from the slope of the line is 23800 cal/mol and the equation for the line is log p = 3.1 - 1198/T.
Reference
The results conform to a log p vs. 1/T plot with a maximum deviation of measured point from the straight line of 5%. The heat of the vaporisation calculated from the slope of the line is 23800 cal/mol and the equation for the line is log p = 3.1 - 1198/T.
Description of key information
The vapour pressure of tungsten hexachloride was reported to be 0.005 mm Hg (0.67 Pa) at a temperature of 25 °C.
Key value for chemical safety assessment
- Vapour pressure:
- 0.67 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.
