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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
explosive properties of explosives
Type of information:
experimental study
Adequacy of study:
key study
Study period:
05 Oct - 02 Nov 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.14 (Explosive properties)
Qualifier:
according to guideline
Guideline:
other: OECD 113 Screening test for thermal stability and stability in air
GLP compliance:
no
Specific details on test material used for the study:
Storage conditions: ambient temperature (10 – 30 °C)
Parameter:
other: Thermal stability (DSC)
Remarks on result:
other: Heat of decomposition was > 500 J/g, therefore main test on explosive properties was executed.
Parameter:
sensitiveness to friction: friction load (N)
Remarks on result:
not sensitive to friction using a friction load of 360 N
Parameter:
other: mechanical sensitivity (shock)
Remarks on result:
other: not sensitive to shock using a mass of 10 Kg falling from 0.4 m
Parameter:
thermal sensitivity - Koenen test: diameter of the orifice plate
Remarks on result:
not thermal sensitive if heated under defined confinement
Remarks:
Tube unchanged

Results
Thermal Stability
DSC measurements in a closed glass crucible with the test item showed two endothermal effects in the ranges of 95 – 120 °C and 225 – 250 °C and an exothermal effect in the range of 390 – 500 °C with a maximum energy of 1713 J/g.

Table 1 – Thermal Stability (DSC measurements)

Weight [mg]

Final temperature [°C]

Temperature range [°C]

Type of effect

Energy [J/g]

11.33

500

95 – 120
225 – 250
390 – 500

endothermal
endothermal
exothermal

n.r.
n.r.
1502

11.52

95 – 120
225 – 250
390 – 500

endothermal
endothermal
exothermal

n.r.
n.r.
1713

n.r.: not relevant

Explosive Properties
The heat of decomposition was > 500 J/g, therefore the main test on explosive properties had to be performed.

Mechanical Stability (friction): Test item was sieved before measurement. No explosion occurred within 6 tests using a pinload of 360 N, only a discoloration of the test item was seen in all tests.

Mechanical Sensitivity (schock): Test item was sieved before measurement, no explosion within 6 tests using a mass of 10 Kg falling from a height of 0.4 m was seen.

Thermal Sensitivity: 3 tests were done with a circular nozzle plate with a hole of 2 mm diameter. No explosion was seen.

Table 2 – Thermal sensitivity results

Test no.

Test item weight [g]

t1[s]

t2[s]

Reaction

Appearance; number of fragments

1

16.4

22

>300

flame

O

2

21

3

21

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 showed no explosion. Compared to the nozzle with 6.0 mm diameter, the venting area of the one with 2.0 mm diameter 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 these facts, an explosion with a nozzle width of 6.0 mm was excluded.

Conclusion: The test item had no explosive properties.

Description of key information

Not explosive (EU Method A.14., Thermal stability, mechanical sensitivity/friction, mechanical sensistivity/shock, thermal sensitivity)

Key value for chemical safety assessment

Explosiveness:
non explosive

Additional information

Thermal stability: The heat of decomposition was > 500 J/g, therefore the main test on explosive properties had to be performed.

Mechanical sensitivity/friction: No explosion occurred within 6 tests using a pinload of 360 N, only a discoloration of the test item was seen in all tests.

Mechanical sensitivity/shock: No explosion within 6 tests using a mass of 10 Kg falling from a height of 0.4 m was seen.

Thermal sensitivity: No explosion observed.

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: The test item had no explosive properties.