Registration Dossier

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
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

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

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.

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

Additional information