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EC number: 227-678-2 | CAS number: 5932-68-3
Boiling point
Administrative data
Link to relevant study record(s)
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 23 February - 22 April, 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- The study was conducted according to an internationally recognised method, and under GLP. No deviation was reported. Test substance is adequately specified with isomer purity. Therefore full validation applies.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling point/boiling range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Deviations:
- no
- Principles of method if other than guideline:
- Not applicable
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- UK GLP compliance programme (inspected on 05 February 2014 / signed on 07 October 2015)
- Type of method:
- method according to Siwoloboff
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- > 130 °C
- Remarks on result:
- other: boiling temperature of test substance was not determinable, as the test substance decomposed at temperatures above approximately 130°C, under normal atmospheric pressure, before boiling.
- Executive summary:
The boiling point of the test substance was measured under GLP according to OECD 103 / EU A2 guideline, Siwoloboff (capillary) method.
The results of duplicate definitive boiling point determinations on test substance were as follows:
As the boiling tubes were heated at 1°C /minute, both samples were observed to darken above approximately 130 °C, indicating decomposition.
The boiling temperature of the test substance was not determinable, as the test substance decomposed at temperatures above approximately 130 °C, under normal atmospheric pressure, before boiling.
Reference
The trial determination showed an approximate decomposition point of 140 °C. When heating was continued in this preliminary test, the decomposed sample appeared to boil at approximately 270 °C.
The results of duplicate definitive boiling point determinations on test substance were as follows:
Barometric pressure: 1033 mbar.
As the boiling tubes were heated at 1 °C /minute, both samples were observed to darken above approximately 130 °C, indicating decomposition. In the case of decomposition, correction is considered superfluous as the determination of decomposition is slightly subjective and can only be regarded as an approximate value.Description of key information
Decomposes (darkening) from ca 130°C before boiling. With prolonged heating, residue boils at ca 270°C.
Key value for chemical safety assessment
Additional information
A fully reliable experimental study, conducted according to a recognized OECD/EU method, is available. It is considered as a key study. As decomposition was observed, no key value will be retained.
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