Registration Dossier

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
24th July 2017 to the 20th November 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

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

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry

Test material

Reference
Name:
Unnamed
Test material form:
solid: crystalline
Details on test material:
Expiry date:01 February 2021
Storage conditions: Room temperature in the dark
Batch 21-16131
Specific details on test material used for the study:
Identification:
2,5-diphenyloxazole
Appearance/Physical state:
White crystalline powder
Batch:
21-16131
Purity:
99.9%
Expiry date:
01 February 2021
Storage conditions:
Room temperature, in the dark

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
> 69.6 - < 71.9 °C
Decomposition:
no

Applicant's summary and conclusion

Conclusions:
The substance, 2,5-diphenyloxazole, leting point was studied in accordance with EC Method A.1 and OECD Method 102 via a GLP-certified laboratory. The study used the Differential Scanning Calorimeter method and determined that the substance wmelting point was 71.4 ± 0.5 °C.
Executive summary:

The substance, 2,5-diphenyloxazole, melting point was studied in accordance with  EC Method A.1 and OECD Method 102 via a GLP-certified laboratory. Aliquots of test item (see following table) were placed in manually pierced crucibles and were subjected to a thermal program from 40 to 100 °C at 1 °C/min. The melting/freezing point is defined as the point at which phase transition from the solid to liquid state (or vice versa) at normal atmospheric pressure occurs. The extrapolated onset point of the relevant endothermic peak is usually stated as the melting/freezing point. As the phase transition can take place over a broad temperature range, it is often described as a melting/freezing range. The study used the Differential Scanning Calorimeter method and determined that the substance melting point was 71.4 ± 0.5 °C.