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Physical & Chemical properties

Explosiveness

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Administrative data

Endpoint:
explosiveness
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2009
Report Date:
2009

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
other: UN F.3 Trauzl Test
Deviations:
no
Qualifier:
according to
Guideline:
other: UN A.1 BAM 50/60 steel tube test (instead of UN 1(a) UN gap test, since this method gives comparable results
Deviations:
no
Qualifier:
according to
Guideline:
other: only Thermal sensitivity (similar to UN 2(b) Koenen Test)
Deviations:
no
Qualifier:
according to
Guideline:
other: UN 1 (c)(i) and UN 2 (c)(i) Time / pressure test
Deviations:
no
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): 2,4-Dichloronitrobenzene
- Analytical purity: 99.8 % ( EC A.14, Time-Pressure-Test, Trauzl Test), 99.7 % (Propagation of detonation)

Results and discussion

Small-scale preliminary testsopen allclose all
Parameter:
other: More sensitive to shock than m-dinitrobenzene
Remarks:
migrated information
Remarks on result:
not measured/tested
Parameter:
other: More sensitive to friction than m-dinitrobenzene
Remarks:
migrated information
Remarks on result:
not measured/tested
Parameter:
other: Explosive under influence of flame
Remarks:
migrated information
Remarks on result:
negative (not further specified)
Parameter:
other: Explosive (not specified)
Remarks:
migrated information
Remarks on result:
negative (not further specified)

Any other information on results incl. tables

I. Explosive power of the substance (UN F.3 Trauzl Test)

Under high confinement, 2,4 -Dichloronitrobenzene exhibits some explosive power. Since the result of the Trauzl test is "not low " in one run, tests UN 1 (a) and UN 2 (a) have to be performed, respectively.

 

Table I.1. Test details of UN F3 Trauzl Test

Test run

Sample mass

Cavity

Before / after

Lead block expansion per 10 g

Result

1

10.0 g

63.4 ml / 89.5 ml

26.1 ml

"Not low"

2

10.0 g

64.3 ml / 94.5 ml

30.2 ml

"Not low"

 

II. Propagation of detonation (UN A.1 BAM 50/60 steel tube test)

2, 4-Dichloronitrobenzene is not able to propagate a detonation. The result of the UN A.1 corresponds to a - in the sense of the UN 1 (a) test.

From these findings it can be concluded that the outcome of the UN 2 (a) test would be - as well since in this

test the detonative initiation is attenuated by a PMME spacer. 2, 4-Dichloronitrobenzene is not sensitive to

detonative shock.

Table. II.1 Test details of the UN A.1 test

Test run

Sample

Observation

Result

1

1420.8 g 2, 4-Dichloronitrobenzene,

solidified from melt

Bulk density 1,45 kg/l

Tube fragmented at upper end; fragmented length: 192 mm

Substance ejected completely

"No"

2

1406,6 g 2, 4-Dichloronitrobenzene,

solidified from melt

Bulk density 1,44 kg/33.2 g 4 -nitrotoluene, liquid

Bulk density 1.15 kg/L

Tube fragmented at upper end; fragmented length: 194 mm

Substance ejected completely

"No"

III. Behaviour when heated under defined confinement (EU A.14 (a) / UN 2 (b) Koenen test)

2, 4-Dichloronitrobenzene shows no violent effect on heating under confinement.(Limiting diameter < 2mm.)

Table III.1 Details of the test EU A.14

Amount of sample

Orifice diameter

TBB / TBE*)

Result

36.8 g

2 mm

54 s / 91 s

"O"

36.7 g

2 mm

51 s / 91 s

"O"

36.6 g

2 mm

53 s / 91 s

"O"

36.7 g

6 mm

54 s / 101 s

"O"

36.8 g

6 mm

55 s / 91 s

"O"

36.8 g

6 mm

50 s / 92 s

"O"

*) Time to beginning of reaction or burning / Time to end of burning
"O":
 tube unchanged

III. Effects of igniting the substance under confinement (UN 1 (c)(i) and UN 2 (c)(i))

Time-pressure-test

According to the criteria of UN test 1 (c) (i), 2,4-Dichloronitrobenzene shows no likelihood of deflagration.

Table IV.1. Details on Time/pressure test UN 1 (c)(i)

Test run

Sample amount

Maximum pressure

Time for pressure rise from 690 kPa to 2070 kPa

Result acc. to UN 1 (c)(i)

Result acc. to UN 2 (c)(i)

Remarks

1

5.0 g

906 kPa

--- ms

"-"

"-"

2070 kPa not reached

2

5.0 g

1250 kPa

--- ms

"-"

"-"

2070 kPa not reached

2

5.0 g

1340 kPa

--- ms

"-"

"-"

2070 kPa not reached

 

Applicant's summary and conclusion

Conclusions:
2, 4-Dichloronitrobenzene is too insensitive for acceptance into the Class of Explosives, and therefore should not be classified.
Executive summary:

Heitkamp D and Keldenich H-P (Currenta), 2009

2,4-dichloro-1-nitrobenzene (2, 4-Dichloronitrobenzene) does not show explosive properties as tested according to the UN test series 1 and 2

Conclusion for 2,3-Dichloronitrobenzene based on the read across with 2,4 -Dichloronitrobenzene

The structurally very similar 2, 4-Dichloronitrobenzene has been tested extensively . This compound has a decomposition energy of 1650 J/g with an onset of 320 °C. In testing, it was found that this compound should not be classified as an explosive.

It can be concluded that the closely related 2, 3-Dichloronitrobenzene which is slightly less energetic should not

be an explosive either. 2, 3-Dichloronitrobenzene is too insensitive for acceptance into the Class of Explosives.