Registration Dossier
Registration Dossier
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EC number: 220-168-0 | CAS number: 2650-18-2
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
Waiving.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
According to the REACH regulation (EC n. 1907/2006), annex VII, column 2, the study does not need to be conducted if the melting point is above 300 °C. If the melting point is between 200 °C and 300 °C, a limit value based on a measurement or a recognised calculation method is sufficient. Based on DSC analysis the decomposition of the test substance started from 259 °C. As a consequence a predicted value for vapour pressure is enough for risk assessment. The estimation method proposed by the OECD 104 is the modified Watson correlation, for which the only experimental data required is the normal boiling point. During the DSC analysis the substance decomposes before melting or boiling therefore, the modified Watson correlation method cannot be used. Nevertheless a prediction made by Epiwin 4.1 of the US EPA by a Modified Grain method has been conducted and the vapour resulted: 9.14 × 10^-34 Pa, at 25 °C.The smile notation used for estimation is: CC/[N+](Cc1cccc(c1)S([O-])(=O)=O)=C2\C=C/C(C=C2)=C(\c3ccc(cc3)N(Cc4cccc(c4)S(=O)(=O)ON)CC)c5ccccc5S(=O)(=O)ON.
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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