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EC number: 483-360-5 | CAS number: 114435-02-8
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From 25 January 2005 to 12 May 2005
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- GLP compliance
- Qualifier:
- according to guideline
- Guideline:
- other: ASTM E537-86
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- (2 December 2002)
- Type of method:
- differential scanning calorimetry
- Specific details on test material used for the study:
- PROCEDURE
- Sample:
Aliquots (0.0056 g and 0.0066 g) of test material were placed in aluminium crucibles, which had been scratched with a needle to aid crystallisation.
- Analysis:
The DSC parameters were as follows:
Calorimeter: Mettler Toledo DSC822e
ThermoHaake Cooler EK45/MT
Temperature program:
* initial: - 20.0°C for 20 minutes
* rate: 5.0°C/min
* final: 50.0°C
Atmosphere: air (static)
- Calibration:
The temperature accuracy of the DSC was assessed using an indium reference standard (purity*99.999%). The melting temperature was determined to be 156.7°C and within the defined tolerance (156.6 ± 0.5°C). The DSC was therefore considered acceptable for use.
- Calculation:
Measured temperatures were converted from °C to K using the following equation:
T = t + 273.15
where T = temperature (K) and t = temperature (°C) - Key result
- Melting / freezing pt.:
- 22.15 °C
- Decomposition:
- no
- Conclusions:
- The melting/freezing temperature of the test material has been determined to be 22.15°C.
- Executive summary:
The determination of the melting point of Monofluoroethylene carbonate was performed by differential scanning calorimetry (DSC) according to ASTM E537 -86, OECD Guideline n°102 and EU Method A.1, under GLP conditions. The result was: 22.15°C.
Reference
Table 1: Thermographic data - Determination 1
Thermal Event |
Interpretation |
Temperature |
|
°C |
K |
||
Exotherm, approximately 3 minutes into determination |
Freezing |
- |
- |
Endotherm |
Melting temperature |
22.10 |
295 |
Table 2: Thermographic data - Determination 2
Thermal Event |
Interpretation |
Temperature |
|
°C |
K |
||
Endotherm |
Melting temperature |
22.20 |
295 |
Mean melting temperature: 295 ± 0.5 K
Description of key information
The melting/freezing temperature of the test material has been determined to be 22.15°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 22.15 °C
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