Registration Dossier
Registration Dossier
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EC number: 442-520-4 | CAS number: -
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From July 29th, 2002 to July 30th, 2002
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 002
- Report date:
- 2002
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- July 27th, 1995
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- December 1992
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
Test material
- Reference substance name:
- Yellow 6314-PPT
- IUPAC Name:
- Yellow 6314-PPT
- Test material form:
- solid
Constituent 1
Results and discussion
Melting / freezing point
- Melting / freezing pt.:
- > 161.7 - < 161.9 °C
- Decomposition:
- yes
- Decomp. temp.:
- > 250 °C
Any other information on results incl. tables
During the preliminary test, a first endothermic heat effect was observed at about 145 °C, immediately followed by a second endothermic heat effect, starting at about 162 °C, followed by the decomposition of the test item starting at about 250 °C. After the experiment, the sample had lost about 45 % of its mass and the color of the sample was black and carbonized.
ln order to determine the melting more precisely, further DSC-runs were recorded. The first main test run was recorded between 80 °C and 160 °C. After this first main test run, the test item was still a powder which proved that the first heat effect is not the melting. ln a second and a third main test run, recorded between 160 °C and 210 °C and 160 °C and 180 °C, respectively, the endothermic heat effect was observed at 161 .7 °C and 161 .8 °C, respectively. During these runs, the samples lost 1.1 % and 1.5 % of their mass, respectively and where melted and colored brownish-black.
Applicant's summary and conclusion
- Conclusions:
- Melting point 161.8 ± 0.1 °C, followed by decomposition starting at 250 °C.
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