Diammonium decaborate

Boiling point

Administrative data

Endpoint:

boiling point

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is a solid which melts above 300°C

Cross-reference

Reason / purpose for cross-reference:

data waiving: supporting information

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP study

Qualifier:

no guideline available

Principles of method if other than guideline:

A quantity of sample, normally 5 - 10 mg, is sealed into a test crucible. This is placed in a furnace cell along with an empty reference pan. The furnace is allowed to equilibrate to the starting temperature and both pans are then heated at a constant rate between 0.5 and 20 K/min until the final temperature is reached. The temperature of the sample and that of the reference pan are monitored. Any exothermic activity within the sample results in a larger heat flow out of the cell relative to the reference pan. All data is logged using a microcomputer.

GLP compliance:

yes (incl. QA statement)

Type of method:

other: Differential scanning calorimetry

Melting / freezing pt.:

> 500 °C

Decomposition:

no

Sublimation:

no

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:

melting point > 500 °C

Executive summary:

The melting point of the test substance was determined to be > 500 °C in a GLP study (2010) by using differential scanning calorimetry (DSC).