Disodium 3-[[2,2'-dimethyl-4'-[[4-[[(p-tolyl)sulphonyl]oxy]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonate

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:

From September 14th, 2017 to January 31st, 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Part I: Classification procedures, test methods and criteria relating to explosives of Class 1

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

The test item is tested as received.

Test series:

UN Test series 1

Method:

UN Test 1 (b): Koenen test

Parameter:

limiting diameter (mm)

Value:

1

Result:

result is considered "-" (negative)

Test series:

UN Test series 1

Method:

UN Test 1 (c) (i): Time/pressure test

Parameter:

other: time for a pressure rise from 690 to 2070 kPa (ms)

Result:

result is considered "-" (negative)

Remarks on result:

time for a pressure rise from 690 to 2070 kPa (ms)

Remarks:

Pressure at 2070 kPa not achieved

Thermal Sensitivity: Koenen-Test

No.	Sample weight / g	Diameter orifice plate / mm	Reaction time t1 / s	Reaction time t2 / s	Reaction	Appearance of tube
1	24.14	1	30	> 300	t1: sparks	Unchanged
2	24.2	1	30	> 300	t1: sparks	Unchanged
3	24.2	1	30	> 300	t1: sparks	Unchanged

Due to the fact that the test series with a 1.0 mm diameter orifice plate showed no explosion the UN-Transport Regulation Test 1(b) and Test 2(b) deemed to be "-".

Time-Pressure-Test

	Test 1	Test 2	Test 3
Time [s] at 690 kPa	Not reached	6.36	6.859
Time [s] at 2.070 kPa	Not reached	Not reached	Not reached
Time for pressure rise [s]	-/-	-/-	-/-

Due to the fact that the test item did not reach a pressure of 2070 kPa the UN-Transport Regulation Test 1(b) and Test 2(b) deemed to be "-".

Interpretation of results:

other: not classified, according to the CLP Regulation (EC) No 1272/2008

Conclusions:

Non explosive

Executive summary:

In the DSC-measurements the test item showed two exothermic effects starting from 160 °C and 430 °C, with an average overall decomposition energy of approximately -460 and >-60 J/g, respectively. Due to the fact that the energy of the exothermic decomposition was below the threshold of -500 J/g in one of the two replicates, further tests on explosive properties were performed.

The test on explosive properties was conducted in accordance with the UN Transport Regulation, Test series 1, 2.

Due to the fact that the test series with a 1.0 mm diameter orifice plate showed no explosion the UN-Transport Regulation Test 1(b) and Test 2(b) deemed to be "-".

Due to the fact that the test item did not reach a pressure of 2070 kPa, the UN-Transport Regulation Test 1(c) and 2(c) deemed to be “-“.

Under the tested conditions, the test item showed no explosive properties.

Conclusion

Non explosive

Description of key information

Non explosive

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

UN Class 1

Justification for classification or non-classification

According to the CLP Regulation (EC) No 1272/2008, 2.1.2 section, classification criteria, substances, mixtures and articles are classified for explosive hazard on the basis of the experiment results, obtained in tests conducted according to the test methods described in Part I of the UN RTDG, Manual of Tests and Criteria.

The classification in the explosives hazard class and further allocation to a division is a very complex, three step procedure. The first step is to ascertain whether the substance or mixture has explosive effects (Test Series 1).

The test item gave negative results in the specific tests of serie 1, therefore it does not meet the criteria to be classified as explosive, according to the CLP Regulation (EC) No 1272/2008.