Propanenitrile, 3-[[4-[[5,6(or 6,7)-dichloro-2-benzothiazolyl]azo]phenyl]ethylamino]-

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Study period:

September 03, 2021 - September 03, 2021

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Version / remarks:

EC No. 440/2008

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Parameter:

sensitiveness to friction: friction load (N)

Value:

360

Remarks on result:

not sensitive to friction using a friction load of 360 N

Key result

Parameter:

sensitiveness to impact: impact energy (J)

Value:

40

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

Value:

2

Number of fragments:

0

Remarks on result:

not thermal sensitive if heated under defined confinement

Individual results:

Thermal stability:

Two DSC measurements in closed glass crucibles showed an endothermal effect in the temperature range of 120 – 180 °C and an exothermal effect in the temperature range of 180 – 425 °C with a maximum energy release of 1062 J/g.

Table 1: Thermal stability (DSC measurements)

Ident-No.	Weight / mg	Final temperature / °C	Temperature range / °C	Type of effect	Energy / J/g
39734	10.92	400	120 – 180 180 – 400	Endothermal Exothermal	n.r. (695)*
39735	10.85	500	120 – 180 180– 425	Endothermal Exothermal	n.r. 1062

n.r.: not relevant
* Exothermal signal not complete at maximum test temperature, energy may be higher

The test item showed an exothermal effect starting at 180 °C with a maximum energy of up to 1062 J/g in closed DSC-measurements.

 

Explosive properties:

The heat of decomposition was above 500 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, only a discoloration of the test item was observed in all tests.

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 2 gives the results of the thermal sensitivity.

Table 2: Thermal sensitivity

Test no.	Weight of test item (g)	Nozzle width (mm)	t1 (s)	t2 (s)	Reaction	Appearance; Number of fragments
1	15.9	2.0	25	> 300	Flame	0
2	15.9	2.0	26	> 300	Flame	0
3	15.9	2.0	26	> 300	Flame	0

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

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

0: 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.

Interpretation of results:

GHS criteria not met

Conclusions:

The main test showed negative results in all endpoints tested. Hence, the test item has no explosive properties in the sense of the European Commission Regulation (EC) No. 440/2008, Method A.14.

Executive summary:

The test item Disperse Red 153 was tested for explosive properties according to European Commission Regulation (EC) No. 440/2008, method A.14.

As the test item Disperse Red 153 showed an exothermal effect starting at 180 °C with an energy of up to 1062 J/g in closed DSC-measurements, the main test on explosive properties according to European Commission Regulation (EC) No. 440/2008, method A.14. was performed. The main test showed negative results in all endpoints tested. Hence, the test item has no explosive properties in the sense of the European Commission Regulation (EC) No. 440/2008, Method A.14.

Description of key information

The test item has 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

The test item Disperse Red 153 was tested for explosive properties according to European Commission Regulation (EC) No. 440/2008, method A.14.

As the test item Disperse Red 153 showed an exothermal effect starting at 180 °C with an energy of up to 1062 J/g in closed DSC-measurements, the main test on explosive properties according to European Commission Regulation (EC) No. 440/2008, method A.14. was performed. The main test showed negative results in all endpoints tested. Hence, the test item has no explosive properties in the sense of the European Commission Regulation (EC) No. 440/2008, Method A.14.