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Physical & Chemical properties

Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
February 21, 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
> 230 °C

Two DSC measurements with a heating rate of 10 K/min showed an endothermal effect (melting) in the temperature range of 105 – 150 °C. The onset temperature (seeTable1) 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 in the temperature range starting at approx. 230 °C.

The results of the DSC measurements are summarized in Table 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

36825

10.85

25

500

110 – 150

133.71

Aluminium with a hole

Black residue

Mass loss:

52%

36827

15.42

25

200

105 – 145

134.23

Aluminium with a hole

Test item was a solidified melt

The test item had a mean melting point of 134.0 °C. Decomposition started at approx. 230 °C.[1]

 

Boiling point / boiling range: DSC measurement

No endothermal effects were observed after the melting and before the exothermal effect. The DSC measurements showed therefore no boiling after the melting effect and before the decomposition started. The test item had no boiling point under atmospheric conditions.


[1]Not valid as thermal stability.

Executive summary:

The test item Disperse Red 167.1 had no boiling point under atmospheric conditions

Description of key information

The test item Disperse Red 167.1 had no boiling point under atmospheric conditions

Key value for chemical safety assessment

Additional information