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EC number: 293-917-2
CAS number: 91648-55-4
=< 57 Pa at 20 °C
Calculation at 50 °C: =< 700 Pa.
The vapour pressure was determined with the use of Grain-Watson
estimation as outlined in the OECD Guildeline 104. The experimental
result of the DSC method was not in the appropriate validity range with
respect to this method. The calculation is based on the lowest possible
boiling temperature, which in fact is probably a decomposition
temperature. In a peer reviewed SIDS Initial Assessment Profile (SIAM
25, 17 -18 October, 2007) it is stated that: "As ionic substances, all
members of this category have extremely low vapour pressures. Calculated
values are in the ranges 1E-11 hPa to 1E-15 hPa (C8 -18 alkyl sulfates)
(...) Therefore, they decompose before reaching their theoretical
boiling points". Thus, the obtained value should be considered an upper
limit of the vapour pressure and accepted for the risk assessment
calculations in the sense of a "worst-case scenario". The same holds for
the value calculated at 50 °C.
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.
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