Pentaboron sodium octaoxide

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:

15/06/2010 - 16/06/2010

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

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Principles of method if other than guideline:

A quantity of sample, normally 5 - 10 mg was sealed in a test crucible. This was placed in a furnace cell along with an empty reference pan. The furnace was allowed to equilibrate to the starting temperature and both pans were then heated at between 0.5 and 20 K/min until the final temperature was reached. The temperature of the sample and that of the reference pan were monitored. Any exothermic activity within the sample results in a larger heat flow out of the cell relative to the reference pan.
The differential scanning calorimeter has an approximate sensitivity of ca. 5 W/kg.

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Melting / freezing pt.:

> 500 °C

Remarks on result:

other: The sample was observed to undergo an endothermic event with an onset at 100 °C, which was due to evaporation of water and not the sample melting, as no re-crystallisation was observed during cool down.

Conclusions:

The melting point of the test substance was assessed using differential scanning calorimetry. The melting point was > 500 °C. The sample was observed to undergo an endothermic event with an onset at 100 °C which was due to evaporation of water and not the sample melting, as no re-crystallisation was observed during cool down.

Executive summary:

The melting point study was performed under GLP compliance by differential scanning calometry. The melting point was > 500 °C. The sample was observed to undergo an endothermic event with an onset at 100 °C which was due to evaporation of water and not the sample melting, as no re-crystallisation was observed during cool down.

Description of key information

The melting point study was performed under GLP compliance by differential scanning calometry. The melting point was > 500 °C. The sample was observed to undergo an endothermic event with an onset at 100 °C which was due to evaporation of water and not the sample melting, as no re-crystallisation was observed during cool down.