Registration Dossier
Registration Dossier
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: 299-135-8 | CAS number: 93857-00-2
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
Vapour pressure [Tripotassium propylsilanetriolate in aqueous solution]: not necessary
Vapour pressure: 4.6E-03 Pa, 1.5E-06 Pa and 1.3E-09 Pa at 25°C for propylsilanetriol, and dimer and trimer of propylsilanetriol respectively. (QSAR)
Key value for chemical safety assessment
Additional information
The requirement to test tripotassium propylsilanetriolate for vapour pressure is waived because the substance is only stable in aqueous solution and, therefore, the test is scientifically unjustified.
At pH 7 and low concentration (conditions relevant for the environment), the monomer (propylsilanetriol) will predominate. Therefore, a vapour pressure of 4.6E-03 Pa at 25°C was predicted for propylsilanetriol using a validated QSAR estimation method.
Similarly, under certain conditions such as high concentration, the dimer and trimer of propylsilanetriol may be formed in solution. Vapour pressure values of 1.5E-06 Pa and 1.3E-09 Pa at 25°C were predicted for the dimer and trimer of propylsilanetriol respectively using a validated QSAR estimation.
The vapour pressure of the silanolate salts is expected to be negligible.
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.
