Registration Dossier
Registration Dossier
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EC number: 944-243-9 | CAS number: -
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
=< 0.751 Pa at 20 °C (Modified Grain method)
Key value for chemical safety assessment
Additional information
Since the substance decomposes during melting, the boiling point or vapour pressure measurements are technically complicated. The QSAR calculation of vapour pressure was performed using the Modified Grain method. This is in compliance with Grain-Watson method, applied for the most substances of the Alkyl Sulfate category.
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 for alkyl sulfates 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".
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.
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