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Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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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:
May-August 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Well-documented guideline study on a well defined test substance.
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
not specified
Type of method:
thermal analysis
Melting / freezing pt.:
>= -96 - <= -91 °C
Atm. press.:
1 atm
Decomposition:
no
Decomp. temp.:
ca. 183 °C
Sublimation:
no
Remarks on result:
other: Test substance does not melt; instead the test substance undergoes a glass transition indicating that the material is amorphous (non-crystalline). Therefore the glass transition ranges are reported instead.

Melting Point / Melting Range of Test Substance by DSC

Specimen No.

Heat Cycle

Onset

 (°C)

Midpoint (°C)

Endset (°C)

Glass Transition Range (°C)

1

1

-96.0

-93.6

-91.0

-96.0 to -91.0

2

1

-95.5

-93.0

-90.2

-95.5 to -90.2

1

2

-95.6

-93.0

-90.3

-95.6 to -90.3

2

2

-95.4

-92.6

-90.1

-95.4 to -90.1
Conclusions:
The test substance does not melt. Instead, it undergoes a glass transition indicating that the material is amorphous (non-crystalline). Therefore, glass transition temperature is reported. The glass transition range is -96 to -91°C determined by DSC.

Description of key information

The melting point of the test substance was assessed according to OECD Test Guideline 102. The test substance does not melt.  Instead, it undergoes a glass transition indicating that the material is amorphous (non-crystalline). Therefore, glass transition temperature is reported. The glass transition range is -96 to -91 °C determined by DSC.

Key value for chemical safety assessment

Additional information

The melting point of the test substance was assessed according to OECD Test Guideline 102 using thermal analysis. The test was performed with a hermetic Al DSC pan. The test substance is a liquid at room temperature. Therefore, the test substance specimens were scanned at 10 °C/min from -140 to 20 °C in duplicate. Prior to analysis, test substance was heated in a vacuum oven at 60 °C to constant weight to remove any residual volatiles (1-butanol).

The test substance does not melt.  Instead, it undergoes a glass transition indicating that the material is amorphous (non-crystalline). Therefore, the glass transition temperature is reported. The glass transition range is -96 to -91 °C.