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Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP-Guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
thermal analysis
Remarks:
differential scanning calorimetry (DSC)
Melting / freezing pt.:
183 °C
Remarks on result:
other: aluminium crucible
Melting / freezing pt.:
184 °C
Remarks on result:
other: closed glass crucible

Melting Point (DSC 820)

The results of the DSC measurement in an aluminium crucible are summarized in the

following table:

rate of heating: 10 K/min

Temperature

range [°C]

 

Onset [°C]

 

Peak max.

[°C]

 

Enthalpy [J/g]

 

Remarks

 

175 – 197

183

 

186

 

107

 

Melting

 

280 – 325

not evaluable

320

 

84

 

Boiling

 

325 – 346

325

330

 

62

 

Decomposition

 

The melting point of the test item is 183 °C.

 

Melting Point (DSC 30)

The results of the DSC measurement in a glass crucible are summarized in the

following table:

rate of heating: 3 K/min

Temperature

range [°C]

 

Onset [°C]

 

Peak max.

[°C]

 

Enthalpy [J/g]

 

Remarks

 

180 – 197

184

18

 

84

 

Melting

 

324 – 356

332

345

 

145

 

Decomposition

 

The melting point of this test item is 184 °C.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP-Guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
thermal analysis
Remarks:
differential scanning calorimetry (DSC)
Melting / freezing pt.:
177 °C

The results of the DSC measurement in an aluminium crucible are summarized in the

following table:

 

Temperature

range [°C]

 

Onset [°C]

 

Peak max.

[°C]

 

Enthalpy [J/g]

 

Remarks

 

153-190

 

177

 

181

 

59

 

Melting

 

241 -271

 

249

 

264

 

4

 

-

273-317

 

293

 

308

 

64

 

Boiling

 

317-337

 

317

 

321

 

23

 

Decomposition

 

 

The melting point of the test item is 177°C.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP-Guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
thermal analysis
Remarks:
differential scanning calorimetry (DSC)
Melting / freezing pt.:
178 °C
Remarks on result:
other: aluminium crucible

Melting Point (DSC 820)

The results of the DSC measurement in an aluminium crucible are summarized in the

following table:

rate of heating: 10 K/min

Temperature

range [°C]

 

Onset [°C]

 

Peak max.

[°C]

 

Enthalpy [J/g]

 

Remarks

 

166 – 192

178

 

180

 

141

 (endothermal)

Melting

 

329 – 346

329

336

 

103

 (exothermal)

Decomposition

 

 

The melting point of the test item is 178 °C.

 

Description of key information

177 °C (technical substance)
178 °C - 184 °C (pure substance)

(OECD 102, DSC)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
184 °C

Additional information