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Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Remarks:
freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 18 February 2016 to 30 March 2016
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
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
method to determine freezing temperature
Remarks:
ethod of crystallization tube in freezing mixture ice/acetone
Specific details on test material used for the study:
- Expiration date of the lot/batch: 13.10.2017
- Analytical purity: 92%
Key result
Melting / freezing pt.:
< -30.2 °C
Remarks on result:
other: The crystallization was not observed during all measurements

During the test, the temperature of samples decreased at a constant rate, for measurement No. 1 to the temperature of -30.4 °C and for measurement No. 2 to the temperature of -30.2°C. The crystallization was not observed during all measurements.

According to Guidance on information requirements and chemical safety assessment Chapter R.7a: Endpoint specific guidance, May 2008, Guidance for the implementation of REACH the study does not need to be conducted below a lower limit of –20 °C.

Measurement of the freezing point of Propionic acid,,2’’ - [(vinylsilylidyne) trioxy] tri-, triethyl ester

Measurement I

Measurement II

Time

[min]

Temperature

[˚C]

Time

[min]

Temperature

[˚C]

0.0

0.0

0.0

0.1

1.0

-1.0

1.0

-1.2

2.0

-2.0

2.0

-2.1

3.0

-2.8

3.0

-2.9

4.0

-3.5

4.0

-3.6

5.0

-4.0

5.0

-4.1

6.0

-4.9

6.0

-4.7

7.0

-5.5

7.0

-5.3

8.0

-6.0

8.0

-5.9

9.0

-6.5

9.0

-6.4

10.0

-7.3

10.0

-7.2

11.0

-8.1

11.0

-7.9

12.0

-8.7

12.0

-8.6

13.0

-9.3

13.0

-9.1

14.0

-9.8

14.0

-9.7

15.0

-10.2

15.0

-10.6

16.0

-10.8

16.0

-11.2

17.0

-11.4

17.0

-11.9

18.0

-11.8

18.0

-12.7

19.0

-12.6

19.0

-13.1

20.0

-13.3

20.0

-13.8

21.0

-13.9

21.0

-14.3

22.0

-14.4

22.0

-14.8

23.0

-14.9

23.0

-15.5

24.0

-15.4

24.0

-16.1

25.0

-16.0

25.0

-16.4

26.0

-16.5

26.0

-16.8

27.0

-17.1

27.0

-17.0

28.0

-17.5

28.0

-17.6

29.0

-17.8

29.0

-18.5

30.0

-18.3

30.0

-19.1

31.0

-18.8

31.0

-20.0

32.0

-19.4

32.0

-20.6

33.0

-20.0

33.0

-21.2

34.0

-20.6

34.0

-21.8

35.0

-21.2

35.0

-22.3

36.0

-21.6

36.0

-22.6

37.0

-21.9

37.0

-23.1

38.0

-22.5

38.0

-23.8

39.0

-22.9

39.0

-24.3

40.0

-23.3

40.0

-24.8

41.0

-23.7

41.0

-25.2

42.0

-24.0

42.0

-25.5

43.0

-24.7

43.0

-26.2

44.0

-25.1

44.0

-26.6

45.0

-25.6

45.0

-27.0

46.0

-26.1

46.0

-27.4

47.0

-26.6

47.0

-27.9

47.5

-

47.5

-28.6

48.0

-27.2

48.0

-29.1

49.0

-27.4

49.0

-29.5

50.0

-27.8

50.0

-29.8

51.0

-28.4

51.0

-30.2

52.0

-28.8

52.0

-

53.0

-29.5

53.0

-

54.0

-30.0

54.0

-

55.0

-30.4

55.0

-

Conclusions:
The freezing point (crystallization) of the test substance was not visually observed up to -30.4 ºC.
Executive summary:

The freezing point of the test substance was determined in accordance with the OECD Guideline 102 with GLP. The method of crystalization tube in freezing mixture ice/acetone was used. The freezing point of the test substance was not visually observed up to -30.4 ºC.

Description of key information

Key study: According to OECD Guideline 102. GLP study. The freezing point of the test substance was not visually observed up to -30.4 ºC.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-30.4 °C

Additional information