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EC number: - | CAS number: -
Explosiveness
Administrative data
Link to relevant study record(s)
- Endpoint:
- explosive properties of explosives
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2021-11-16 until 2021-11-29 (experimental phase)
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Test Guideline 113
- Version / remarks:
- version: 1981
- Deviations:
- no
- 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:
- Rev. 7 (2019), Class 1 and Appendix 6
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Key result
- Parameter:
- thermal sensitivity - Koenen test: diameter of the orifice plate
- Value:
- 0
- Number of fragments:
- 0
- Remarks on result:
- other: The observed effect is assigned to type “D”: Wall of tube split. According to UN Transport Regulation Test 1 (b) and 2 (b) this type of result is regarded as “no explosion”. Due to the fact that the test series with a 1.0 mm diameter orifice plate result
- Key result
- Parameter:
- other: Time-Pressure Test
- Remarks on result:
- other: The test item did not reach a pressure of 2070 kPa.
- Interpretation of results:
- GHS criteria not met
- Remarks:
- The test item does not have to be classified as explosive substance according to GHS or CLP Regulation (EC) No 1272/2008 Annex I: 2.1, respectively.
- Conclusions:
- According to the results of the test on thermal stability and explosive properties, the test item pentasodium 4-amino-3-[{4-[(2,4-disulfonatophenyl)diazenyl]-3-methylphenyl}diazenyl]-5-hydroxy-6-[(4-nitro-2-sulfonatophenyl)diazenyl]naphthalene-1,7-disulfonate is classified as following:
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) No 1272/2008: Annex I: 2.1): The test item does not have to be classified as explosive substance according to GHS or CLP Regulation (EC) No 1272/2008 Annex I: 2.1, respectively. - Executive summary:
The test item in closed crucibles showed an exothermic effect in the temperature range of 170 – 290°C with an average energy release of -580 J/g. An endothermic effect was detected in the temperature range of 290 – 420 °C.
In the DSC-measurement the energy of the exothermic decomposition of the test item Bayscript Black TP LXS 51134 was above the threshold of -500 J/g but below the threshold of -800 J/g. Therefore, the Koenen-test and Time-Pressure test for explosive properties had to be performed.
In the test 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 test on thermal stability and explosive properties, the test item is classified as following:
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) No 1272/2008: Annex I: 2.1): The test item does not have to be classified as explosive substance according to GHS or CLP Regulation (EC) No 1272/2008 Annex I: 2.1, respectively.- Endpoint:
- explosive properties of explosives
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2021-11-16 until 2021-12-02 (experimental phase)
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Test Guideline 113
- Version / remarks:
- version: 1981
- Deviations:
- no
- 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:
- Rev. 7 (2019), Class 1 and Appendix 6
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Specific details on test material used for the study:
- 20% w/w aqueous solution of pentasodium 4-amino-3-[{4-[(2,4-disulfonatophenyl)diazenyl]-3-methylphenyl}diazenyl]-5-hydroxy-6-[(4-nitro-2-sulfonatophenyl)diazenyl]naphthalene-1,7-disulfonate (as marketed)
- Key result
- Parameter:
- other: DSC
- Remarks on result:
- other: Up to the maximum temperature of 500 °C of the DSC measurement in closed crucibles the test item exhibits an average decomposition energy of -170 J/g. This value is below the threshold of -500 J/g.
- Interpretation of results:
- GHS criteria not met
- Remarks:
- The test item does not have to be classified as explosive substance according to GHS or CLP Regulation (EC) No 1272/2008 Annex I: 2.1, respectively.
- Conclusions:
- According to the results of the test on thermal stability and explosive properties, the test item pentasodium 4-amino-3-[{4-[(2,4-disulfonatophenyl)diazenyl]-3-methylphenyl}diazenyl]-5-hydroxy-6-[(4-nitro-2-sulfonatophenyl)diazenyl]naphthalene-1,7-disulfonate is classified as following:
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) No 1272/2008: Annex I: 2.1): The test item does not have to be classified as explosive substance according to GHS or CLP Regulation (EC) No 1272/2008 Annex I: 2.1, respectively. - Executive summary:
The test item in closed crucibles showed an exothermic effect in the temperature range of 170 – 300°C with an average energy release of -170 J/g. Endothermic effects were observed starting at 300 °C.
Up to the maximum temperature of 500 °C of the DSC measurement in closed crucibles the test item exhibits an average decomposition energy of -170 J/g. This value is below the threshold of -500 J/g. The danger of detonative and explosive properties of the test item can be excluded. Based on the results, the test item is classified as follows:
UN-Transport Regulations: 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) No 1272/2008: Annex I: 2.1): The test item does not have to be classified as explosive substance according to GHS or CLP Regulation (EC) No 1272/2008 Annex I: 2.1, respectively.
Referenceopen allclose all
Thermal stability (DSC)
For the DSC runs PN 22334 and PN 22353 in closed crucibles an exothermic effect could be observed in the temperature range of 170 – 290 °C with an average energy release of -580 J/g. An endothermic effect was detected in the temperature range of 290 – 420 °C. The results of the DSC-measurements are summarized in Table 1.
Table 1: Results of the DSC-measurements
| No. | Crucible material / Atmosphere | Sample weight /mg | TOnset of effect / °C | Energy release (delta H) / J/g* |
| PN22334 | Gold-plated stainless steel / N2 | 8.31 | 170 300 | -680 (exothermic) +160 (endothermic) |
| PN22353 | Glass / N2 | 7.49 | 190 290 | -470 (exothermic) +90 (endothermic) |
*rounded values
Explosive Properties UN Class 1
The DSC-measurements in the closed crucibles showed a decomposition of the test item with an average decomposition energy of - 580 J/g, meaning the decomposition energy is above 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 is below the threshold of -800 J/g the Trauzl test had not to be performed.
Thermal Sensitivity: Koenen-Test
Three tests with a 1.0 mm diameter orifice plate were performed. In all tests, first a flame was detected within the first half minute after heating start. After approx. 110 s the tube blowed up and the wall of the tube splitted. The flame kept burning until the end of the test. After the test, the wall and bottom of the tube was bulged out and the wall was split.
Table 2: Results of the Koenen-Test
| No. | Sample weight / g | Diameter orifice plate / mm | Reaction time t1 /s | Reaction time t2 /s | Reaction | Appearance of tube |
| 1 | 22.01 | 1.0 | 28 – 300 | 116 | t1: Flame t2: Tube bursting | D”: Wall of tube split |
| 2 | 22.00 | 1.0 | 29 – 300 | 110 | t1: Flame t2: Tube bursting | D”: Wall of tube split |
| 3 | 22.02 | 1.0 | 28 – 300 | 116 | t1: Flame t2: Tube bursting | D”: Wall of tube split |
t1: time of first reaction: Flame
t2: time to main reaction: Blowing and bursting of tube
The observed effect is assigned to type “D”: Wall of tube split. According to UN Transport Regulation Test 1 (b) and 2 (b) this type of result is regarded as “no explosion”.
Due to the fact that the test series with a 1.0 mm diameter orifice plate resulted in no explosion, the limiting diameter is recorded as being less than 1.0 mm and thus the UN Transport Regulation Test 1 (b) and 2 (b) deemed to be “-”.
Explosive Properties; Time-Pressure Test
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 “-”.
Table 3: Results of time pressure tests
| Test 1 | Test 2 | Test 3 | |
| Time [s] at 690 kPa | Not reached | Not reached | Not reached |
| Time [s] at 2,070 kPa | Not reached | Not reached | Not reached |
| Time for pressure rise [s] | - | - | - |
Thermal stability (DSC)
For the DSC runs PN22336, PN22352 and PN22354 an exothermic effect could be observed in the temperature range of 170 – 300 °C with an average energy release of --170 J/g. Afterwards a drifting baseline is observed, which is common for aqueous samples. Within this drifting baseline, endothermic effects were observed starting at 300 °C. The results of the DSC-measurements are summarized in Table 1.
Table 1: Results of the DSC-measurements
| No. | Crucible material / Atmosphere | Sample weight /mg | TOnset of effect / °C | Energy release (delta H) / J/g* |
| PN22336 | Gold-plated stainless steel / N2 | 3.45 | 170 300 370 | -210 (exothermic) +60 (endothermic) +30 (endothermic) |
| PN22352 | Gold-plated stainless steel / N2 | 7.61 | 170 310 400 | -170 (exothermic) +170 (endothermic) +10 (endothermic) |
| PN22354 | Gold-plated stainless steel / N2 | 3.62 | 170 300 370 | -130 (exothermic) +100 (endothermic) +30 (endothermic) |
*rounded values
The shape of signal and onset temperatures are in good agreement to the DSC measurements
of the pure substance
Explosive Properties UN Class 1
Due to the average decomposition energy being below the threshold of -500 J/g, further tests
for explosive properties did not have to be performed.
Description of key information
Investigation of the solid substance pentasodium 4-amino-3-[{4-[(2,4-disulfonatophenyl)diazenyl]-3-methylphenyl}diazenyl]-5-hydroxy-6-[(4-nitro-2-sulfonatophenyl)diazenyl]naphthalene-1,7-disulfonate
The test item in closed crucibles showed an exothermic effect in the temperature range of 170 – 290°C with an average energy release of -580 J/g. An endothermic effect was detected in the temperature range of 290 – 420 °C. In the DSC-measurement the energy of the exothermic decomposition of the test item Bayscript Black TP LXS 51134 (pentasodium 4-amino-3-[{4-[(2,4-disulfonatophenyl)diazenyl]-3-methylphenyl}diazenyl]-5-hydroxy-6-[(4-nitro-2-sulfonatophenyl)diazenyl]naphthalene-1,7-disulfonate) was above the threshold of -500 J/g but below the threshold of -800 J/g. Therefore, the Koenen-test and Time-Pressure test for explosive properties had to be performed. In the test on explosive properties according to UN Transport Regulation, Test series 1 and 2, the test item showed no explosive properties.
Investigation of a 20% w/w solution of pentasodium 4-amino-3-[{4-[(2,4-disulfonatophenyl)diazenyl]-3-methylphenyl}diazenyl]-5-hydroxy-6-[(4-nitro-2-sulfonatophenyl)diazenyl]naphthalene-1,7-disulfonate
According to the results of the test on thermal stability and explosive properties, the test item pentasodium 4-amino-3-[{4-[(2,4-disulfonatophenyl)diazenyl]-3-methylphenyl}diazenyl]-5-hydroxy-6-[(4-nitro-2-sulfonatophenyl)diazenyl]naphthalene-1,7-disulfonate is classified as following:
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) No 1272/2008: Annex I: 2.1): The test item does not have to be classified as explosive substance according to GHS or CLP Regulation (EC) No 1272/2008 Annex I: 2.1, respectively.
Key value for chemical safety assessment
- Explosiveness:
- non explosive
Additional information
Justification for classification or non-classification
Based on the results, the test item is classified as follows:
UN-Transport Regulations: 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) No 1272/2008: Annex I: 2.1): The test item does not have to be classified as explosive substance according to GHS or CLP Regulation (EC) No 1272/2008 Annex I: 2.1, respectively.
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