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EC number: 300-340-2 | CAS number: 93925-38-3
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:
- Between 3 October 1996 and 13 November 1996
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Version / remarks:
- Commission Regulation (EC) No. 440/2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Remarks:
- ASTM 537-86
- Boiling pt.:
- 539 K
- Atm. press.:
- 101.42 kPa
- Decomposition:
- yes
- Remarks on result:
- other: At the termination of each test, the appearance of the test material was a black tar-like residue.
- Conclusions:
- The test material decomposed from approximately 539 +/- 0.5K prior to boiling (101.49kPa).
- Executive summary:
Method
The determination was carried out in a GLP-compliant study by differential scanning calorimetry (DSC) using the procedure specified in ASTM E537-86, Methods A.2 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC).
Results
The test material decomposed from approximately 539 +/- 0.5K prior to boiling (101.42kPa).
Reference
Results
Thermograms and thermographic data for Determinations 1 and 2 are shown in the following tables
Thermographic Data-Determination 1
Thermal Event | Temperature | ||
oC | oK | ||
Minor compenent/impurity endotherm Onset of exothermic decomposition of test material Boiling endotherm of test material | 227 267 289 | 500 540 562 | |
Thermographic Data-Determination 2
Thermal Event | Temperature | ||
oC | oK | ||
Minor compenent/impurity endotherm Onset of exothermic decomposition of test material Boiling endotherm of test material | 225 265 285 | 498 539 559 | |
Atmospheric pressure: 102.22 kPa
Mean melting temperature: 312±0.5K
Meanboilingand/ordecompositiontemperature:655±0.5K
Discussion
The determinations were performed under nitrogen atmospheres. This was to ensure that if any decomposition was observed, this was probably thermal and not oxidative.
To aid in DSC interpretation a visual assessment was performed using metal block apparatus. The test material was observed to bubble from approximately 220°C. The test material was observed to change to a light brown colour from approximately 280°C. This bubbling and colour change was indicative of boiling with decomposition.
Description of key information
The test material decomposed from approximately 539 ± 0.5 K prior to boiling (101.42kPa) (EU Method A.2).
Key value for chemical safety assessment
Additional information
Method
The determination was carried out in a GLP-compliant study by differential scanning calorimetry (DSC) using the procedure specified in ASTM E537-86, Methods A.2 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC).
Results
The test material decomposed from approximately 539 +/- 0.5K prior to boiling (101.42kPa).
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