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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:
June 21, 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
ca. 130 °C

A DSC measurement with a heating rate of 10 K/min showed an exothermal effect in the temperature range of 130 – 260 °C and an endothermal effect in the temperature range of
260 – 305 °C. The results of the DSC measurement are summarized inTable 1.

Table1: Melting point (DSC measurements)

Ident No.

Test item /

mg

Starting temperature /

°C

Final test temperature /

°C

Temperature range (endo-thermal) /

°C

Onset (melting) / °C

Crucible

Observations after the measurement

36317

8.64

25

500

260 – 305

-

Aluminium with a hole

Black residue

No endothermal effects were observed before the exothermal effect. The DSC measurement showed therefore no melting before the decomposition started

The test item had no melting point under atmospheric conditions.

Conclusions:
The test item Disperse Red 362 had no melting point under atmospheric conditions.

Description of key information

The test item Disperse Red 362 had no melting point under atmospheric conditions.

Key value for chemical safety assessment

Additional information