Registration Dossier
Registration Dossier
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EC number: 476-880-9 | CAS number: -
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- calculation (if not (Q)SAR)
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: OECD guideline and EU method.
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- GLP compliance:
- no
- Type of method:
- other: estimated by calculation
- Key result
- Temp.:
- ca. 25 °C
- Vapour pressure:
- 0 Pa
- Conclusions:
- The calculation should be regarded as a rough estimation and the real vapour pressure of the test substance is below 4.1 x 10-37 Pa at 25 °C.
- Executive summary:
The estimation of the vapour pressure of the test substance was based on the EEC directive 92/69, Part A, Methods for the determination of physico-chemical properties, A.4 “Vapour Pressure”, EEC Publication No. L383, December 1992 and the OECD Guideline No. 104, “Vapour Pressure”, adopted July 27, 1995.
The boiling point of the test substance was calculated to be approximately 978 °C using Meissner’s method. The calculation was performed for the cationic part of the molecule. The vapour pressure of the test substance was estimated to be 4.1 x 10-37 Pa at 25 °C based on the boiling point calculated and using the Modified Watson Correlation.
The vapour pressure was calculated only for the cationic part of the molecule. Using the Meissner’s method for the calculation of the boiling point, it is not possible to take the ionic character into account. The calculation should be regarded as a rough estimation and the real vapour pressure of the test substance is below 4.1 x 10-37 Pa at 25 °C.
Reference
Description of key information
Key study: Calculation according to OECD guideline 104 and EU method A.4.
The calculation should be regarded as a rough estimation and the real vapour pressure of the test substance is below 4.1 x 10-37 Pa at 25 °C.
Key value for chemical safety assessment
Additional information
In accordance to the column 2 of the Annex VII of REACH Regulation, a recognised calculation method is sufficient since no melting point was detected up to 400 ºC and decomposition was seen at 350ºC in the melting point study (See 4.2.).
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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