[2-[[4-[(2-chloro-4-nitrophenyl)azo]phenyl]ethylamino]ethyl](2-hydroxypropyl)dimethylammonium chloride

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosiveness

Type of information:

experimental study

Adequacy of study:

key study

Study period:

May 08, 2015 - May 12, 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: guideline study (EC A.14.)

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Deviations:

no

GLP compliance:

no

Parameter:

other: Explosive (not specified)

Remarks:

migrated information

Remarks on result:

negative (not further specified)

Remarks:

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

Individual results

Thermal stability

DSC-measurements in closed glass crucibles with the test item showed one endothermal effect in the temperature range 150 – 210 °C and one exothermal effects in the temperature range of 205 – 290 °C with a median enthalpy of -1423 J/g.

The results are summarised inTable 1.

Table 1: Thermal stability (DSC-measurements)

Ident-No.	Weight [mg]	Final temperature [°C]	Temperature range [°C]	Type of effect	Enthalpy [J/g]
35027	10.56	320	155 – 210 210 – 290	Endothermal Exothermal	n.r. -1500
35031	8.06	320	150 – 205 205 – 285	Endothermal Exothermal	n.r. -1346

n.r. not relevant

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.

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	22.3	2.0	13	> 300	Flame	O
2	22.3	2.0	13	> 300	Flame	O
3	22.2	2.0	12	> 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.

Interpretation of results:

non explosive

Remarks:

Migrated information

Conclusions:

The test item is non-explosive.

Executive summary:

To investigate the explosive properties of the test item it was tested according to methods OECD 113 (Screening test for thermal stability and stability in air) and EU A.14 (Explosive properties).

As the heat of decomposition was above 500 J/g in OECD 113, the main test on explosive properties (EU A.14) was performed. The test item was neither sensitive to mechanical shock and friction or to thermal influence.

Thus it can be concluded that the item has no explosive properties in the sense of the method EU A.14.

Description of key information

The explosive properties of the test item were investigates in accordance with methods OECD 113 (Screening test for thermal stability and stability in air) and EU A.14 (Explosive properties).

Based on the results of the screening test (OECD 113), the main test on explosive properties (EU A.14) was performed. The item did not show explosive properties in the main test.

Key value for chemical safety assessment

Explosiveness:

non explosive