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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:
February 26, 2018
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
Melting / freezing pt.:
210.1 °C
Decomposition:
yes
Decomp. temp.:
> 370 °C

Melting point / melting range: DSC measurement

Two DSC measurements with a heating rate of 10 K/min showed an endothermal effect (melting) in the temperature range of 190 – 240 °C. The onset temperature (see Table1) was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline. The first DSC measurement additionally showed an exothermal effect starting at approx. 370°C. The results of the DSC measurements 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

36835

13.15

25

500

190 –240

210.2

Aluminium with a hole

Black residue

Mass loss:40%

36836

12.77

25

274

195 – 230

210.0

Aluminium with a hole

Test item was a solidified melt

The test item had a mean melting point of 210.1 °C. Decomposition started at approx. 370 °C.

Executive summary:

The test item Disperse Yellow 71 had a mean melting point of 210.1 °C under atmospheric conditions.

Description of key information

The test item Disperse Yellow 71 had a mean melting point of 210.1 °Cunder atmospheric conditions.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
210.1 °C

Additional information