Registration Dossier

Diss Factsheets

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:
2002
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

Constituent 1
Reference substance name:
Yellow 6314-PPT
IUPAC Name:
Yellow 6314-PPT
Test material form:
solid

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.