Trititanium pentaoxide

Melting point / freezing point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Principles of method if other than guideline:

Not described

Type of method:

other: not detailed in handbook

Melting / freezing pt.:

1 777 °C

Conclusions:

According to the materials Handbook: A concise Desktop Reference the melting point of the substance is 1777°C.

Executive summary:

According to the materials Handbook: A concise Desktop Reference the melting point of the substance is 1777°C.

Reference 2

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

GLP compliance:

yes (incl. QA statement)

Type of method:

other: DSC and capillary method as verfication.

Specific details on test material used for the study:

Batch C000363565

Remarks on result:

not determinable because of methodological limitations

The thermograms of the DSC runs PN19484 and PN19485 are shown in Figure 1 and Figure 2. The test item showed an endothermic effect in the temperature range of approx. 100 – 120 °C.

To verify the results of the DSC measurements, an additional measurement with the capillary method was performed in the temperature range of room temperature to 400 °C with a heating rate of 10 K/min in triplicate. No melting point could be observed during the measurement. At approx. 120 °C a liquid component was visible, which evaporated quickly after further heating. This observation can be brought into harmony with the endothermic effect of the DSC-measurement. A grey solid remained until the end of the measurement.

Combining the results of the DSC-measurement and the capillary method, no melting of the test item could be observed. The endothermic effect in the DSC can be assigned to evaporating components (e.g. water).

Conclusions:

The test item Ti3O5/Al2O3 Granulat 0.7-5mm has no melting point up to the maximum measuring temperature of 500 °C at atmospheric pressure (1011 hPa) as determined by Differential Scanning Calorimetry (DSC) and confirmed by the Capillary Method according to Regulation (EC) No 440/2008 Method A.1. and OECD Test Guideline 102 (1995).

Executive summary:

The test item Ti3O5/Al2O3 Granulat 0.7-5mm has no melting point up to the maximum measuring temperature of 500 °C at atmospheric pressure (1011 hPa) as determined by Differential Scanning Calorimetry (DSC) and confirmed by the Capillary Method according to Regulation (EC) No 440/2008 Method A.1. and OECD Test Guideline 102 (1995).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

1 777 °C