Reaction mass of cobalt sulphide and nickel sulphide and trinickel disulphide

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2010-09-13 to 2010-10-08

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Guideline study deficiences: no atmospheric pressure was stated

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Boiling pt.:

> 600 °C

Atm. press.:

1 013 mBar

Remarks on result:

other: The test item has no boiling point under atmospheric conditions up to 600°C. There was no atm. pressuere stated, it was assumed to be 1013mbar.

Boiling Point / Boiling Range(DSC)

The DSC-run up to the maximum temperature of 600 °C in an aluminium crucible with a hole showed two endothermic effects in the temperature range of 70 °C to 170 °C (this first endothermic effect could at least partially be caused by the evaporation of water (water content 15.4% according to sponsor´s information)) and 340 °C to 570 °C (this second endothermic effect could be caused by some kind of physical change, e.g. changes of the crystal structure), respectively with an overall energy of 665 J/g. A mass loss of about 10 mg was detected.

An optical inspection after the measurement showed that the test item was unchanged (regarding both the physical form and the colour of the test item).

No.	Set point	Heating rate	End point	Melting properties	Remarks
1	50 °C	10 K/min	400 °C	no melting observed	Starting at about 100 °C some liquid separated and condensed at the “cold” surface of the glass tube outside the heating block. An optical inspection after the measurement showed that the solid test item was unchanged (black powder).

In the capillary measurement the main part of the test item showed no changes in the aggregate state. Thus it was concluded, that the test item does not melt or boil up to the temperature of 400 °C.

Conclusions:

The test item has no boiling point under atmospheric conditions up to 600°C

Description of key information

No boiling point can be stated. Reaction mass of cobalt sulphide, nickel sulphide and trinickel disulphide had no boiling point under atmospheric conditions up to 600°C.