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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:
10 Jan 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to other study
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
adopted in 2008
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Melting / freezing pt.:
135 °C
Atm. press.:
1 013 hPa
Decomposition:
yes
Decomp. temp.:
135 °C

Results
Two DSC measurements with a heating rate of 10 K/min showed an endothermal effect (melting) in the temperature range of 135 – 215 °C. The onset temperature was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline.

Table 1 – Melting point DSC measurement results

Test item [mg]

Starting temperature [°C]

Final temperature [°C]

Temperature range (melting) [°C]

Onset [°C]

Observations after the measurement

14.15

25

500

140 – 205

163.64

--

7.45

220

135 - 215

163.25

Test item was a melt of red/orange colour; mass loss 9%

 

The test item melted under decomposition starting at 135 °C.

Description of key information

Substance melted under decomposition starting at 135 °C (OECD 102, DSC).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
135 °C

Additional information