Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

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:
2017-09-19 to 2018-01-31
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Atm. press.:
ca. 1 atm
Decomposition:
yes
Decomp. temp.:
ca. 130 °C
Remarks on result:
other: No melting point could be determined. Substance only showed a softening effect in the temperature range between 40 - 75 °C, followed by decomposition at a temperature of approx. 130 °C.

Two DSC measurements with a heating rate of 10 K/min showed an endothermal effect in the temperature range of 40 – 75 °C.

The first DSC measurement additionally showed an exothermal effect starting at approx 130 °C indicating the decomposition of the test item. The decomposition of the substance was confirmed by the appearance of the sample after measurement (black residue) combined with a mass loss of 72 % of the initial weigh-in (see table).

The second measurement was terminated at 120 °C to ensure that the endothermal effect is the melting/softening effect. No decomposition was observed and the sample appeared as a clear solified melt with no mass loss.

The results of the DSC measurements are summarized in the table below.

DSC run

Weigh-in / mg

Starting temperature

Final test temperature

Temperature range (endo-thermal) / °C

Onset / °C

Crucible

Observations after the measurement

1

10.71

25

500

50-70

56.53

Aluminium with hole

Black residue Mass loss: 72 %

2

10.05

25

120

40-75

56.77

Aluminium with hole

Test item was a clear solified melt

Mass loss: -

The test item showed an unusually low energy consumption during the endothermal effect (<10 J/g). Therefore it was concluded that the test item did not actually melt. The test item most likely softened in the temperature range of 40 – 75 °C. No additional endothermal effects were observed after the softening and before the exothermal effect at approximately 130 °C that indicated a decomposition of the test item.

Conclusions:
The observed low endothermal effect indicated only a softening (energy consumption < 10 J/g) of the test item. The test item softened in the temperature range between 40 – 75 °C under atmospheric conditions and started to decompose at a temperature of approx. 130 °C.
Executive summary:

The melting point / melting range of the test item was determined by DSC measurement according to OECD 102. The study showed that the test item has no exact melting point but shows an unusual softening in the temperature range between 40 - 75 °C. The result "softening and no actual melting" was concluded because of the unusually low energy consumption during the endothermal effect (<10 J/g). No additional endothermal effects were observed after the softening and before the exothermal effect at approximately 130 °C that indicated a decomposition of the test item.

Description of key information

The melting point / melting range of the test item was determined by DSC measurement according to OECD 102. The study showed that the test item has no exact melting point, but shows an unusual softening in the temperature range between 40 - 75 °C.

Key value for chemical safety assessment

Additional information

The result "softening and no actual melting" was concluded because of the unusually low energy consumption during the endothermal effect (<10 J/g). No additional endothermal effects were observed after the softening and before the exothermal effect at approximately 130 °C that indicated a decomposition of the test item.