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Administrative data

Link to relevant study record(s)

Description of key information

The test item had no explosive properties in the sense of the European Commission Regulation (EC) No. 440/2008, Method A.14.

Key value for chemical safety assessment

Explosiveness:
non explosive

Additional information

Two DSC-measurements in closed glass crucibles (in high pressure crucibles) with the test item showed a broad exothermal effect in the temperature range of 160 – 370 °C with an overall enthalpy of -760 J/g and -741 J/g. The measurement was terminated at 500 °C. The unsteady base line at higher measuring temperatures is supposed to result from a pressure build-up of the test item.

Thermal stability (DSC-measurements)

Ident-No.

Weight [mg]

Final temperature [°C]

Temperature range [°C]

Type of effect

Enthalpy [J/g]

34860

10.91

500

160 – 370

Exothermal

-760

34862

11.52

500

160 – 370

Exothermal

-741

Explosive properties

The median decomposition enthalpy was - 750 J/g. Therefore, the main test on explosive properties had to be performed.

Mechanical sensitivity (friction):

The test item was sieved (mesh size 0.5 mm) before the measurement. No explosion occurred within 6 tests using a pinload of 360 N.

Mechanical sensitivity (shock):

The test item was sieved (mesh size 0.5 mm) before the measurement. No explosion within 6 tests using a mass of 10 kg falling from a height of 0.4 m was observed.

Thermal sensitivity:

Three tests were performed with a circular nozzle plate with a hole of 2 mm diameter. No explosion was observed.Table 42gives the results of the thermal sensitivity.

Thermal sensitivity

Test no.

Weight of test item [g]

Nozzle width [mm]

t1[s]

t2[s]

Reaction

Appearance; Number of fragments

1

18.0

2.0

24

> 300

Flame

O

2

18.0

2.0

27

> 300

Flame

O

3

17.9

2.0

21

> 300

Flame

O

t1: time to any reaction, e.g. whistle or flame

t2: time to main reaction, e.g. rupture of tube or flashing

O: tube unchanged

 

The test on thermal sensitivity carried out with a nozzle with a diameter of 2.0 mm showed no explosion. Compared to the nozzle with a diameter of 6.0 mm the venting area of the nozzle with 2.0 mm is smaller by an order of magnitude. Additionally the physical state of the test item excludes the enrichment of high-energy components caused by evaporation of volatile solvents. Due to these facts, an explosion with a nozzle width of 6.0 mm was excluded.

The test item had no explosive properties in the sense of the European Commission Regulation (EC) No. 440/2008, Method A.14.

Justification for classification or non-classification

The test item had no explosive properties in the sense of the European Commission Regulation (EC) No. 440/2008, Method A.14.