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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 215-686-9 | CAS number: 1344-08-7
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
Liquid: The substance is a 25% solution in water, therefore performing a study is scientifically unjustified since the vapour pressure of sodium polysulfide solution will be the same as the vapour pressure for water.
Solid: The vapour pressure of the test item disodium tetrasulfide (EC no. 215-686-9) at 20 °C is 2 x 10-10 Pa.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
Solid: The vapour pressure of the test item disodium tetrasulfide (EC no. 215 -686 -9) was determined according to OECD guideline no. 104 [adopted on 27 July 1995] and EU test method A.4 [Council Regulation (EC) No 440/2008 of 30 May 2008] with the vapour pressure balance (effusion method).
For that determination, a sample of the test item is heated in a small furnace and placed in an evacuated bell jar. The furnace is covered by a lid which carries small holes of known diameters. The vapour of the substance, escaping through one of the holes, is directed onto a balance pan of a highly sensitive balance which is also enclosed in the evacuated bell jar. The momentum of the vapour jet acts as a force on the balance. The vapour pressure of the test item disodium tetrasulfide (EC no. 215-686-9) at 20 °C is 2 x 10-10 Pa.
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.
