Tetrasodium 3,3'-[[6-[(2-hydroxyethyl)amino]-1,3,5-triazine-2,4-diyl]bis[imino(2-methyl-4,1-phenylene)azo]]bisnaphthalene-1,5-disulphonate

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

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

Deviations:

no

GLP compliance:

no

Specific details on test material used for the study:

Storage: Room temperature

Test series:

UN Test series 1

Method:

other: BAM Trauzl test

Parameter:

other: increase of the hole of a massive lead-block after plugging with sand ignited with a standard detonator Nr. 8 (referred to 10 g of substance)

Result:

result is considered "-" (negative)

Remarks on result:

other: Instead of the UN gap test the BAM Trauzl Test was carried according to 11.3.5 respectively 12.3.4. of the UN-MTC.

Test series:

UN Test series 1

Method:

UN Test 1 (b): Koenen test

Parameter:

limiting diameter (mm)

Result:

result is considered "-" (negative)

Remarks on result:

other: no effect on heating under confinement with a limiting diameter less than 1 mm

Test series:

UN Test series 1

Method:

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

Parameter:

other: deflagration

Result:

negative, no ability to deflagrate

Remarks on result:

other: not explosive when tested according to UN-MTC

Result DTA screening:

No.	Mass	Temperature Range	Type of Effect	Energy
1	26.2 mg	223 °C to > 500 °C	exothermic	More than -830 J/g
2	22.5 mg	222 °C to > 500 °C	exothermic	More than -750 J/g

Result BAM Trauzl test:

Test Run	Mass	Volume before Test	Volume after Test	Increase of Volume	Increase of Volume / 10 g
1	8.2 g	62.0 mL	63.2 mL	1.2 mL	1.5 mL
2	7.9 g	62.0 mL	65.0 mL	3.0 mL	3.8 mL

Test result: "no"

Result Koenen test:

Nozzle Diameter	Sample Mass	Reaction Initiation after	Results
1 mm	16.0 g	52 s	No fragments, cartridge unchanged
1 mm	16.0 g	61 s	No fragments, cartridge unchanged
1 mm	15.9 g	64 s	No fragments, cartridge unchanged

Result: “—“, no effect on heating under confinement with a limiting diameter less than 1 mm.

Result time pressure test

Test Run	Sample Mass	Max. Pressure	Time from 690 kPa to 2070 kPa
1	5.0 g	844 kPa	N / A
2	5.0 g	906 kPa	N / A
2	5.0 g	906 kPa	N / A

Result. “—“, the substance shows no deflagration.

Direct Yellow 86 is not explosive when tested according to UN-MTC.

Interpretation of results:

GHS criteria not met

Conclusions:

Based on results of screening DTA, BAM Trauzl test, Koenen test and time pressure test Direct Yellow 86 is not explosive when tested according to UN-MTC.

Executive summary:

On Direct Yellow 86 explosive properties were tested according to UN-MTC procedure (REACH Annex VII, 7.11 and CLP Annex I, 2.1).

The structural formula of the test item contains functional groups quoted in UN-MTC1 (appendix 6, table A 6.1) which may indicate explosive properties. Appendix 6, point 3 ‘Screening procedures for substances which may have explosive properties’ of UN-MTC refers to the decomposition energy.

Based on results of screening DTA, BAM Trauzt test, Koenen test and time pressure test Direct Yellow 86 is not explosive when tested according to UN-MTC.

Description of key information

On Direct Yellow 86 explosive properties were tested according to UN-MTC procedure (REACH Annex VII, 7.11 and CLP Annex I, 2.1).

The structural formula of the test item contains functional groups quoted in UN-MTC1 (appendix 6, table A 6.1) which may indicate explosive properties.

Appendix 6, point 3 ‘Screening procedures for substances which may have explosive properties’ of UN-MTC refers to the decomposition energy.

A screening DTA (Differential Thermal Analysis based on DIN 51007) was made in order to rule out a decomposition of the test substance. A sample of the test item in a melted glass container was heated up in a DTA oven with a linear rate of 3 K/min up to 500 °C. A sample of aluminiumoxide was heated in the same oven as comparison. The temperature difference of both sample were recorded electronically. From these differences the heat flow of transformation of the test item was calculated electronically. The result was plotted as time/heat-flow diagram. Integration gives the heat release of the transformation. The test was made twice.

No.	Mass	Temperature Range	Type of Effect	Energy
1	26.2 mg	223 °C to > 500 °C	exothermic	More than -830 J/g
2	22.5 mg	222 °C to > 500 °C	exothermic	More than -750 J/g

BAM Trauzl test

Instead of the UN gap test the BAM Trauzl Test was carried according to 11.3.5 respectively 12.3.4. of the UN-MTC. The test was performed as described in the test procedure F.3 of UN-MTC. The test

item was filled in the hole of a massive lead-block and after plugging with sand ignited with a standard detonator Nr. 8. The increase of the hole was assessed by filling with water. The increase was referred to 10 g of substance. The test was performed twice.

Test Run	Mass	Volume before Test	Volume after Test	Increase of Volume	Increase of Volume / 10 g
1	8.2 g	62.0 mL	63.2 mL	1.2 mL	1.5 mL
2	7.9 g	62.0 mL	65.0 mL	3.0 mL	3.8 mL

Test result: "no"

Koenen-Test

This test is used to determine whether the sample shows an explosive decomposition behavior under the influence of intense heat and under high confinement. The test was performed as described in the test procedure Test 1 (b) of UN-MTC.

Nozzle Diameter	Sample Mass	Reaction Initiation after	Results
1 mm	16.0 g	52 s	No fragments, cartridge unchanged
1 mm	16.0 g	61 s	No fragments, cartridge unchanged
1 mm	15.9 g	64 s	No fragments, cartridge unchanged

Result: “—“, no effect on heating under confinement with a limiting diameter less than 1 mm.

Time pressure test

The test was performed as described in the test 1 (c) respectively test 2 (c) of UN-MTC. The test was performed 3 times.

Test Run	Sample Mass	Max. Pressure	Time from 690 kPa to 2070 kPa
1	5.0 g	844 kPa	N / A
2	5.0 g	906 kPa	N / A
2	5.0 g	906 kPa	N / A

Result. “—“, the substance shows no deflagration.

Direct Yellow 86 is not explosive when tested according to UN-MTC.

Key value for chemical safety assessment

Explosiveness:

non explosive