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Physical & Chemical properties

Explosiveness

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Endpoint:
explosive properties of explosives
Type of information:
experimental study
Adequacy of study:
key study
Study period:
7 to 9 July 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.14 (Explosive properties)
Qualifier:
according to
Guideline:
EPA OPPTS 830.6316 (Explodability)
GLP compliance:
yes (incl. certificate)
Remarks:
Hess, Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany
Key result
Parameter:
sensitiveness to friction: friction load (N)
Remarks on result:
not sensitive to friction using a friction load of 360 N
Key result
Parameter:
sensitiveness to impact: impact energy (J)
Remarks on result:
not sensitive to impact using an impact energy of 40 J
Key result
Parameter:
thermal sensitivity - Koenen test: diameter of the orifice plate
Remarks on result:
not thermal sensitive if heated under defined confinement

Thermal stability

Two DSC-measurement in closed glass crucible with the test item showed exothermal effects in temperature ranges of 240-430 °C and 235-415 °C, with enthalpies of -897 J/g and -763 J/g, respectively.

The heat of decomposition was above 500 J/g. Therefore the main test on explosive properties was 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, only a discoloration of the test item was observed.

 

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, only a decomposition in the tests was observed.

 

Thermal sensitivity

Three tests were performed with a circular nozzle plate with a hole of 2 mm diameter. No explosion was observed. The results of the thermal sensitivity are reported in the following table.

 

Test no.

Weight of test item (g)

Nozzle width (mm)

t1 (s)

t2 (s)

Reaction

Appearance: Number of fragments

1

15.9

2.0

14

>300

Flame

B

2

15.9

2.0

15

>300

Flame

O

3

15.9

2.0

14

>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

B: wall and bottom bulged out

 

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.

 

Final results

The test item, pure substance had no explosive properties in the sense of the EU Method A. 14.

Endpoint:
explosive properties of explosives
Type of information:
experimental study
Adequacy of study:
key study
Study period:
16 to 23 November 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.14 (Explosive properties)
Qualifier:
according to
Guideline:
EPA OPPTS 830.6316 (Explodability)
GLP compliance:
yes (incl. certificate)
Remarks:
Hess, Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany
Key result
Parameter:
thermal sensitivity - Koenen test: diameter of the orifice plate
Remarks on result:
not thermal sensitive if heated under defined confinement
Key result
Parameter:
sensitiveness to impact: impact energy (J)
Remarks on result:
not sensitive to impact using an impact energy of 40 J
Key result
Parameter:
sensitiveness to friction: friction load (N)
Remarks on result:
not sensitive to friction using a friction load of 360 N

Thermal stability

Two DSC-measurement in closed glass crucible with the test item showed exothermal effects in temperature ranges of 235-415 °C and 235-420 °C, with enthalpies of -770 J/g and -810 J/g, respectively.

The heat of decomposition was above 500 J/g. Therefore the main test on explosive properties was performed.

 

Mechanical Sensitivity (Friction)

The test item was sieved < 0.5 mm. No explosion occurred within 6 tests using a pinload of 360 N, only a discoloration of the test item was observed.

 

Mechanical sensitivity (shock)

The test item was sieved < 0.5 mm. No explosion occurred within 6 tests using a mass of 10 kg falling from a height of 0.4 m, only a discoloration in the tests was observed.

 

Thermal sensitivity

Three tests were performed with a circular nozzle plate with a hole of 2 mm diameter. The following table gives the results of the thermal sensitivity.

 

Test no.

Weight of test item (g)

Nozzle width (mm)

t1 (s)

t2 (s)

Reaction

Appearance: Number of fragments

1

15.3

2.0

9

>300

Flame

A

2

15.5

2.0

9

>300

Flame

O

3

15.5

2.0

9

>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

A: bottom of tube bulged out

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.

 

Final results

The test item, technical substance had no explosive properties in the sense of the EU Method A. 14.

Description of key information

The substance has no explosive properties in the sense of the EU Method A.14.

Key value for chemical safety assessment

Explosiveness:
non explosive

Additional information

Justification for classification or non-classification

The available data on explosive properties of the test substance do not meet the criteria for classification according to Regulation (EC) 1272/2008, and are therefore conclusive but not sufficient for classification: Based on thermal, friction and shock sensitivity tests the substance is not explosive.