Aluminum magnesium oxide

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

January 2018

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Reason / purpose for cross-reference:

reference to same study

Qualifier:

no guideline followed

Principles of method if other than guideline:

TGA analysis was performed on 3 samples of the substance, up to 1000°C.

GLP compliance:

no

Type of method:

other: thermogravimetric analyses

Key result

Decomposition:

ambiguous

Decomp. temp.:

ca. 600 °C

Remarks on result:

not determinable

TGA curves of all 3 tested batches showed weight loss up to ca. 140 -150°C, and then an effect at approximately 600°C, which was ascribed to decomposition of residual OH and CO3 groups in the structure.

No distinct melting effect was observed, thus it is concluded that the substance has no melting temperature.

Conclusions:

The substance does not melt (up to 500°C).

Executive summary:

TGA analysis was performed on 3 batches of the substance, up to 1000°C. A dynamic rate high resolution program was used to obtain the data (Hi-Res sensitivity 1.0, Ramp 50.00°C/min, resolution 4.0).

Helium gas was used to create an inert atmosphere in all analyses.

In none of the tests a melting effect was observed. From this it is concluded that the substance does not have a melting point.

Description of key information

The substance does not melt (up to 500°C).

Additional information

Result obtained from TGA tests up to 1000°C, following a similar procedure as described in test guidelines, using a dynamic rate high resolution program (Hi-Res sensitivity 1.0, Ramp 50.00°C/min, resolution 4.0) and an inert atmosphere (Helium).