4-fluoro-1,3-dioxolan-2-one

Melting point / freezing point

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