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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:
August 14, 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
method to determine freezing temperature
Key result
Melting / freezing pt.:
-6.7 °C

Table 1. Measurement of freezing point.

 

Measurement No. 1

Measurement No. 2

Time, [min]

Temperature, [˚C]

Time, [min]

Temperature, [˚C]

0.0

0.5

0.0

-0.1

2.0

0.0

2.0

-0.9

4.0

-0.1

4.0

-1.5

6.0

-0.4

6.0

-1.9

8.0

-1.0

8.0

-2.4

10.0

-1.4

10.0

-3.0

12.0

-2.0

12.0

-3.5

14.0

-2.2

14.0

-4.2

16.0

-2.4

16.0

-4.5

18.0

-2.7

18.0

-5.2

20.0

-2.9

20.0

-5.8

22.0

-3.2

22.0

-6.3

24.0

-3.3

24.0

-6.6

26.0

-3.5

26.0

-7.1

28.0

-4.0

28.0

-7.5

30.0

-4.3

30.0

-8.0

32.0

-4.7

32.0

-8.5

34.0

-5.2

33.0

-8.6

36.0

-5.6

33.5

-8.0

38.0

-5.8

33.7

-7.6

40.0

-6.5

34.0

-7.4

42.0

-7.0

35.0

-6.8

44.0

-7.6

36.0

-6.7

46.0

-8.3

37.0

-6.9

48.0

-8.0

38.0

-7.1

48.2

-7.1

39.0

-7.6

48.3

-6.8

40.0

-8.1

48.5

-6.7

42.0

-8.5

50.0

-6.7

44.0

-8.7

52.0

-7.0

46.0

-9.2

54.0

-7.0

48.0

-9.6

56.0

-7.1

50.0

-10.0

58.0

-7.3

-

-

60.0

-7.5

-

-

62.0

-8.1

-

-

64.0

-8.5

-

-

66.0

-8.8

-

-

68.0

-9.1

-

-

Initial value of freezing point, [°C]

*-6.7

Initial value of freezing point, [°C]

**-6.7

Average temperature of an initial freezing

point ± stand.

dev., [°C]

-6.7

*/ As the value of an initial freezing point for the measurement No. 1 the value which corresponded to 48th minute was assumed.

**/ As the value of an initial freezing point for the measurement No. 2 the value which corresponded to 36th minute was assumed.

 

 

Conclusions:
The average value of an initial freezing point is equal to -6.7 °C.
Executive summary:

The determination of the freezing point of test substance was carried out according to EU A.1 Method “Melting/freezing Temperature” and a standard PN-ISO 1392:2002. Test liquid was cooled and the freezing point was determined by observing the decreasing temperature. The average value of an initial freezing point was equal to - 6.7 °C.

Description of key information

Key study: Test method EU A.1. GLP study. The average value of an initial freezing point was equal to - 6.7 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-6.7 °C

Additional information

Key study: The determination of the freezing point of test substance was carried out according to EU A.1 Method “Melting/freezing Temperature” and a standard PN-ISO 1392:2002. The average value of an initial freezing point was equal to - 6.7 °C.