Registration Dossier

Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010-08-03 to 2010-11-19
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
signed 2010-03-22
Type of method:
capillary method
Specific details on test material used for the study:
Appearance: solid
Storage conditions: room temperature
Decomposition:
yes
Decomp. temp.:
ca. 250 °C
Remarks on result:
other: No evidence of melting

In the preliminary trial, the test substance was observed to darken from approximately 300ºC, with no sign of melting. As it was considered difficult to visually discern the temperature at which darkening commenced due to the dark colour of the sample, differential scanning calorimetry (DSC) was employed to further examine this apparent decomposition.

Using a Mettler Toledo FP900 Thermosystem with FP85 DTA/DSC measuring cell, in an air atmosphere at a heating rate of 5°C/minute, a DSC trace was obtained. Gradual, but significant, positive deviation from the baseline was evident from approximately 250°C, indicating decomposition.

Conclusions:
The test substance, Fe3P, was found to decompose from approximately 250°C without melting.

Description of key information

Fe3P Was found to decompose from approximately 250°C without melting.

Key value for chemical safety assessment

Additional information

A melting point determination was performed as part of a set of tests for physico-chemical properties (Huntingdon Life Sciences, 2011, Study FGE0002). The melting point was determined according to OECD Method 102 and EC Method A1, and the study was conducted in compliance with GLP.


Fe3P was found to decompose from approximately 250°C without melting.

Categories Display