Registration Dossier

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 01 February 2016 to 20 April 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2016
Report Date:
2016

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2008
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
1998
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
- Appearance: off-white powder
- Storage condition of test material: At room temperature

Results and discussion

Melting / freezing point
Key result
Decomposition:
yes
Decomp. temp.:
> 225 °C
Remarks on result:
other: No melting point.

Any other information on results incl. tables

TGA EXPERIMENT

From 100°C upwards the weight of the sample decreased significantly. At 244°C the sample weight had decreased by 25%. After the experiment, a charred residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test item.

 

DSC EXPERIMENT 1

A small endothermic peak between 75°C and 150°C was observed. The extrapolated onset temperature of the peak could not be determined due to the peak shape. Another endothermic effect was observed between 225°C and 275°C. After the experiment, a charred residue remained in the sample container.

DSC EXPERIMENT 2

To investigate the peak between 75°C and 150°C a repeated heating cycle was applied. With the first heating the extrapolated onset temperature of the endothermic peak between 75°C and 150°C could not be determined. During cooling no exothermic peaks could be observed. Therefore, it was concluded that the endothermic effect between 75°C and 150°C was not resulting from the melting of the test item. During the second heating, the endothermic effect between 225 and 275°C did not shift to a higher temperature. It demonstrated that reaction and/or decomposition of the test item was the reason for the endothermic effect. After the experiment, a charred residue remained in the sample container.

According to these observations, it was concluded that the test item has no melting and no boiling temperature.

Applicant's summary and conclusion

Conclusions:
The substance Broomdex has no melting temperature. Reaction and/or decomposition started at 225°C.
Executive summary:

The melting temperature was determined using differential scanning calorimetry in a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200.

Reaction and/or decomposition started at 225°C. Melting of the test item was not observed below the temperature at which reaction and/or decomposition started. The substance has no melting temperature.