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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
14-Aug-2013 to 30-Oct-2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
no
Type of method:
thermal analysis
Remarks:
Differential Scanning Calorimetry (DSC) and freezing point apparatus
Key result
Melting / freezing pt.:
< -51 °C
Atm. press.:
1 014 hPa

Results

Measured data of temperature versus time

 

Temperature (°C)

Time (min)

Run 1

Run 2

0

25.0

25.0

1

20.0

18.0

2

11.5

11.0

3

4.5

3.5

4

0.0

1.5

5

-3.0

-4.5

6

-9.5

-11.0

7

-14.5

-14.5

8

-18.0

-17.5

9

-22.0

-22.5

10

-25.0

-24.0

11

-29.0

-27.5

12

-32.0

-31.0

13

-34.0

-33.0

14

-37.0

-35.0

15

-39.0

-38.5

16

-41.0

-40.5

17

-43.0

-44.0

18

-44.0

-45.0

19

-45.5

-46.0

20

-48.0

-47.5

21

-49.0

-48.5

22

-50.0

-49.5

23

-51.5

-51.0

Freezing temperature

 < -51.5

 < -51.0

Average

< -51.3

 

The melting point of the sample could not be determined at a temperature range of -150 to approximately 40 °C by Differential Scanning Calorimeter (DSC). There was no endothermic peak. The freezing point was measured using freezing point apparatus.

 

Freezing point of test item at 101.4 kPa

 

 

Temperature

Sample name

Item

°C

K

test item

Freezing point

< - 51

< 222

Note: Temperature in Kelvin (K) = Temperature in °C + 273.15 

 

Freezing point results of two measurements at 101.4 kPa

 

 

Temperature

Sample name

Item

Run

°C

K

test item

Freezing point

Run 1

< - 52

< 221

Freezing point

Run 2

< - 51

< 222

Note: Temperature in Kelvin (K) = Temperature in °C + 273.15 

Conclusions

The freezing temperature of was less than -51 °C (222 K) at 101.4 kPa as there was no period of constant temperature. The test item remained a clear colourless liquid without showing any indication of a freezing process.

Conclusions:
A freezing temperaure value of <-51 °C (at 1014 hPa) was determined for the test substance according to OECD 102.

Description of key information

Freezing temperature: <-51 °C at 1014 hPa (EU Method A.1, differential scanning calorimetry and freezing point apparatus).

Key value for chemical safety assessment

Additional information