Registration Dossier

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
21 March 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report Date:
2017

Materials and methods

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

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
Test item: Leuco Sulfur Red 14
Appearance: light red solid
CAS No: 68585-53-5
EC No: 271-559-8
Specific details on test material used for the study:
Expiry date: 06 March 2020
Storage:room temperature

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
> 500 °C
Remarks on result:
other: After the experiments the color of the test item was darkened in the crucible. The endotherm and exotherm peaks in the thermograms do not imply phase transition from a solid to liquid state.
Remarks:
Using a linear heating rate melting point was not observed from room temperature up to 500 °C

Any other information on results incl. tables

After the experiments the color of the test item was darkened in the crucible.

The endotherm and exotherm peaks in the thermogramsdo not implyphase transition from a solid to liquid state. Using a linear heating rate melting point was not observed from room temperature up to 500 °C.

Applicant's summary and conclusion

Conclusions:
Using a linear heating rate melting point was not observed from room temperature up to 500 °C.
Executive summary:

The test was carried out at normal atmospheric pressure. Using a linear heating rate melting point was not observed from room temperature up to 500 °C.

Study objective:

For the determination of the melting point or melting range, differential scanning calorimetry method was used. A small amount of the test item was inserted into the furnace of the device and the melting point was determined based on measuring the heat flow while raising the temperature. The heat flow in and out of a sample and a reference sample was measured as a function of temperature as the sample was heated.

When the sample undergoes a phase transition, the corresponding change of enthalpy gives a departure from the base line of the heat flow record. The difference in energy input necessary to maintainidenticaltemperatures between the substance and the reference sample is recorded. The measurement signal is the energy absorbed by or released by the sample.

After the experiments the color of the test item was darkened in the crucible.The endotherm and exotherm peaks in the thermogramsdo not implyphase transition from a solid to liquid state.Using a linear heating rate melting point was not observed from room temperature up to 500 °C.