Registration Dossier
Registration Dossier
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EC number: 216-251-6 | CAS number: 1533-78-4
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing 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
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 134 °C
- Executive summary:
The test item Disperse Red 167.1 had a mean melting point of 134.0 °C under atmospheric conditions.
Reference
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 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 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 |
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.
Description of key information
The test item Disperse Red 167.1 had a mean melting point of 134.0 °C under atmospheric conditions.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 134 °C
Additional information
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