5-amino-2-nitrobenzoic acid

Explosiveness

Administrative data

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Study period:

28.08.2019-25.09.2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2019

Report date:

2019

Materials and methods

Test guideline

Test guideline 1

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

Version / remarks:

Class 1 Test series 1 / 2, Test 1(b) / 2(b): Koenen Test
Class 1 Test series 1 / 2, Test 1(c) (i) / 2(c) (i): Time Pressure Test
Class 4, Division 4.1: Test series F, Test F.3: Trauzl Test

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

other: OECD 113 (1981) Screening Test for Thermal Stability and Stability in Air

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

5-amino-2-nitrobenzoic acid

EC Number:

236-283-4

EC Name:

5-amino-2-nitrobenzoic acid

Cas Number:

13280-60-9

Molecular formula:

C7H6N2O4

IUPAC Name:

5-amino-2-nitrobenzoic acid

impurity 1

Reference substance name:

Water

EC Number:

231-791-2

EC Name:

Water

Cas Number:

7732-18-5

Molecular formula:

H2O

IUPAC Name:

Oxidane

impurity 2

Reference substance name:

Unknown impurities.

Molecular formula:

Not available as unknown impurities.

IUPAC Name:

Unknown impurities.

Test material form:

solid

Details on test material:

Batch / Lot No. 10044431

Specific details on test material used for the study:

Batch No.: 10044431
Storage Conditions: Room temperature (approx. 15 to 25 °C)

Results and discussion

Small-scale preliminary tests

Parameter:

other: Exothermic decomposition energy (J/g)

Value:

-1 140

Remarks on result:

other: Explosivity could not be excluded as the DSC measurement was above the threshold of -500 J/g.

Results of test series for explosives

Results of test series for explosives 1

Key result

Test series:

other: UN Test series 1 and 2

Method:

UN Test 1 (b): Koenen test

Parameter:

limiting diameter (mm)

Value:

1

Result:

negative, no explosion

Remarks on result:

other: Bottom and wall of tube bulged out

Results of test series for explosives 2

Key result

Test series:

other: UN Test series 1 and 2

Method:

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

Parameter:

other: time (s) for pressure rise from 690 kPa to 2,070 kPa

Result:

result is considered "-" (negative)

Remarks:

Pressure rise not reached

Remarks on result:

p < 2070 kPa

Results of test series for explosives 3

Key result

Test series:

other: UN Test series F

Method:

other: BAM Trauzl Test

Parameter:

other: volume of the enlarged cavity

Result:

result is considered "-" (negative)

Remarks on result:

other: expansion of 7.8 mL per 10 g (using 5.10 g of test item) in the second test

Any other information on results incl. tables

Thermal Stability (OECD 113)

In the DSC runs PN18271 and PN18272, the test item showed an endothermic effect starting at a temperature of approx. 240 °C, which can be assigned to the melting of the test item (see Section 4.2 Melting point). The endothermic effect was directly followed by an exothermic effect starting at a temperature of 250 °C, with an average decomposition energy of -1060 J/g. No further thermal effects could be observed up to the maximum test temperature of 500 °C.

The results of the DSC measurements are summarized in a table:

No.	Crucible material	Sample weight / mg	Start of effect / °C	Energy / J/g
PN18271	Glass	6.45	240 250	+20  (endothermic) -980  (exothermic)
PN18272	Glass	5.82	240 250	+30  (endothermic) -1140  (exothermic)

Energies of exothermic effects are presented in the table as negative values and energies of endothermic effects as positive values.

Explosive properties UN Class 1

The DSC measurements in closed crucibles showed a decomposition of the test item with an maximum decomposition energy of -1140 J/g, meaning the decomposition energy goes beyond the threshold of -500 J/g to exclude explosive properties.

Due to the fact that the decomposition energy is above the threshold of -500 J/g the Koenen and the Time Pressure test had to be performed.

Due to the fact that the decomposition energy goes above the threshold of -800 J/g also the Trauzl Test had to be performed.

Explosive Properties; Thermal Sensitivity: Koenen Test

One series of three tests with a 1.0 mm diameter orifice plate were performed.

Results of the Koenen Test are presented in the table below:

No.	Sample weight / g	Diameter orifice plate / mm	Reaction time t /s	Main Reaction	Appearance of tube
1	14.80	1	16 – 100	flame	“B”: Bottom and wall of tube bulged out
2	14.80	1	16 – 100	flame	“B”: Bottom and wall of tube bulged out
3	14.80	1	16 – 100	flame	“B”: Bottom and wall of tube bulged out

 

Due to the fact that the test series with anorifice plate diameter of 1.0 mm showed no explosionthe UN-Transport Regulation Test 1(b) and 2(b) is deemed to be “-“.

Explosive Properties; Time-Pressure Test

The results of the three tests conducted for the Time-Pressure test are sumarised in the table below.

	Test 1	Test 2	Test 3	Tolerance
Time [s] at 690 kPa	Not reached	Not reached	Not reached	Minimum	Maximum
Time [s] at 2,070 kPa	Not reached	Not reached	Not reached	- 30 %	+ 30 %
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(c)(i) and 2(c)(i) deemed to be “-“.

Explosive Properties; Trauzl Test

One test with a test item mass of 4.85 g was carried out. Thevolume of the enlarged cavity is 4.0 mL. The normalization to 10 g of the test item results in an expansion of 8.3 mL per 10 g. Due to the fact that the normalized expansion was above 8 mL per 10 g test item, a second testwith a test item mass of 5.10 g was carried out for verification. Thevolume of the enlarged cavity of the second test is 4.0 mL. The normalization to 10 g of the test item results in an expansion of 7.8 mL per 10 g.

Due to this result, the UN-Transport Regulation Test F.3 results in to be “No”. Based on this the UN-Transport Regulation Test 1(a) and 2(a) is deemed to be “-“.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

According to the results of the tests on explosive properties (UN Transport Regulation, Test series 1 and 2), the test item does not have to be classified as explosive substance in class 1 according to the UN Transport Regulation nor as explosive substance according to GHS or CLP Regulation EC 1272/2008 Annex 1: 2.1.

Executive summary:

Thermal Stability (OECD 113)

The test item 5-Amino-2-nitrobenzoic acid (CAS no. 13280-60-9) showed an endothermic effect starting at a temperature of approx. 240 °C, which can be assigned to the melting of the test item (see report CSL-19-1030.01). The endothermic effect was directly followed by an exothermic effect starting at a temperature of 250 °C, with an average decomposition energy of -1060 J/g.

Explosive Properties UN Class 1:

In the DSC measurement the energy of the exothermic decomposition of the test item
5-Amino-2-nitrobenzoicacid (CAS no. 13280-60-9) was > -500 J/g. Therefore, further tests on explosive properties had to be performed.

In the tests on explosive properties according to UN Transport Regulation, Test series 1 and 2, the test item showed no explosive properties.

According to the results of the tests on explosive properties, the following conclusion can be drawn:

UN Transport Regulation: The test item does not have to be classified as explosive substance in class 1 according to the UN Transport Regulation.

GHS (CLP Regulation EC 1272/2008: Annex 1: 2.1): The test item does not have to be classified as explosive substance according to GHS or CLP Regulation EC 1272/2008 Annex 1: 2.1, respectively.