Registration Dossier
Registration Dossier
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EC number: 221-070-0 | CAS number: 2997-92-4
Explosiveness
Administrative data
Link to relevant study record(s)
- Endpoint:
- explosive properties of explosives
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 10.12.-12.12.2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.14 (Explosive properties)
- Deviations:
- yes
- Remarks:
- only test for mechanical sensitivity (shock) performed
- GLP compliance:
- no
- Parameter:
- other: More sensitive to shock than m-dinitrobenzene
- Remarks:
- migrated information
- Remarks on result:
- negative (not further specified)
- Parameter:
- other: More sensitive to friction than m-dinitrobenzene
- Remarks:
- migrated information
- Remarks on result:
- negative (not further specified)
- 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)
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- The substance is not explosive upon heat, mechanical shock or friction.
- Executive summary:
The explosive properties of the test item were determined following EU A.14.
In the test for thermal sensitivity, no explosion was observed.
In the test for mechanical sensitivity (shock), no explosion was observed using an impact energy of 40 J.
In the test for mechanical sensitivity (friction), no explosion was observed using a weight of 360 N and a speed of 10 mm in 0.44 seconds.
- Endpoint:
- explosive properties of explosives
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: statement from national authority with test results, limited documentation
- Qualifier:
- according to guideline
- Guideline:
- other: Test series of the UN Recommendations on the Transport of Dangerous Good, Manual of Tests and Criteria
- Principles of method if other than guideline:
- UN-Test E.1
UN-Test E.2
UN-Test A.1
UN-Test C.1
UN-Test C.2
UN-Test F.3
UN-Test H.4
sensitivity to mechanical shock
sensitivity to friction
Additionally Differential thermal analysis (DTA) and Differential Scanning Calorimetry (DSC) - GLP compliance:
- no
- Key result
- Parameter:
- other: More sensitive to shock than m-dinitrobenzene
- Remarks:
- migrated information
- Remarks on result:
- negative (not further specified)
- Key result
- Parameter:
- other: More sensitive to friction than m-dinitrobenzene
- Remarks:
- migrated information
- Remarks on result:
- negative (not further specified)
- Key result
- Parameter:
- other: Explosive under influence of flame
- Remarks:
- migrated information
- Remarks on result:
- negative (not further specified)
- Key result
- Parameter:
- other: Explosive (not specified)
- Remarks:
- migrated information
- Remarks on result:
- negative (not further specified)
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- The substance is not explosive but self decomposing.
- Executive summary:
The following tests were conducted and following results were obtained with the substance 2,2'-azobis[2 -methylpropionamidine) dihydrochloride:
DSC: decomposition heat 596 - 664 J/g, ONSET temperature 168 °C
DTA: ONSET temperature 155 °C
UN-Test E.1: No
UN-Test E.2: Low
UN-Test A.1: No
UN-Test C.1: Yes, slowly
UN-Test C.2: Yes, slowly
UN-Test F.3: No
UN-Test H.4: SADT > 75 °C
sensitivity to mechanical shock: sensitive, > 30 J
sensitivity to friction: not sensitive
Referenceopen allclose all
All observations are presented in the following table.
| Method | number of conducts | loading | number of positive reactions | results |
| Thermal Sensitivity | 3 with 2 mm; 3 with 6 mm | 18 g | 0 | not explosive |
| Mechanical Sensitivity (shock) | 6 with 40 J | 40 mm3 | 0 | not explosive |
| Mechanical Sensitivity (friction) | 6 with 360 N | 10 mm3 | 0 | not explosive |
In the test for thermal sensitivity with an orifice of 6 mm, after ten seconds, white fume was observed for about ten seconds, and after 2.5 minutes, the test item started to burn under formation of white fume. In the test with an orifice of 2 mm, a short hissing noise was observed with white fume and sparkles after ten seconds. After two minutes, the test item burned with a flame fountain under formation of white fume.
In the test for mechanical sensitivity (shock) only formation of a little white smoke and brown deposits on the steel cylinders could be observed in some cases, but no bang or flame. The test substance decomposed using an impact energy of 40 J, but showed no sign of explosive properties.
The test for mechanical sensitivity (friction) yielded a grey line on the porcelain peg in every experiment.
According to the national reference institute (BAM, Bundesanstalt für Materialprüfung), these observations are no sign of explosive properties.
Differential thermal analysis:
up to 144 °C no reaction observed. Above 144 °C, an exothermic reaction began with a maximum of dT = 128 K at 158 °C oven temperature.
Differential Scanning Calorimetry:
| experiment Nr. | mass | decomposition heat | extrapolated ONSET temperature |
| 1 | 3.01 mg | 664 J/g | 168 °C |
| 2 | 5.55 mg | 596 J/g | 167 °C |
UN-Test E.1
| experiment Nr. | 1 | 2 | 3 |
| mass (g) | 18.0 | 18.0 | 18.0 |
| nozzle diameter (mm) | 1.0 | 1.0 | 1.0 |
| t1 / t1 +t2 / t2 | 6/240/234 | 6/240/234 | 6/240/234 |
| fragment picture (number) | 0(0) | 0(0) | 0(0) |
| Evaluation | no explosion | ||
UN-Test E.2
| Experiment Nr. | mass (g) | nozzle diameter (mm) | Reaction time t1 (s) | reaction time t2 (s) | Result |
| 1 | 10 | 1.0 | 77 | 7 | smoke and fizzling |
| 2 | 10 | 1.0 | 75 | 5 | smoke and fizzling |
| 3 | 10 | 1.0 | 76 | 8 | smoke and fizzling |
| 4 | 50 | 1.0 | 86 | 1 | explosion |
Evaluation: Low
UN-Test A.1
Against the detonation of 50 g Hexogen enhancement load with 5 % wax in a 2'' steel pipe, the substance (638 g) was not sensible. 39 cm of the pipe and about 300 g substance remained.
Evaluation: No
UN-Test C.1
Incorporation in the pressure-time-bomb and measuring the times for the pressure increase from 790 kPa to 2170 kPa, in three runs the following results were obtained: 412 ms, 194 ms, 273 ms
Evaluation: yes, slowly
UN-Test C.2
The deflagration test was conducted at 50 °C substance temperature. The deflagration speeds where 1.28 mm/s and 1.72 mm/s.
Evaluation: yes, slowly
UN-Test F.3
In the lead block test, a volume increase of 7 ml resp. 5 ml based on 10 g was obtained.
Evaluation: No
UN-Test H.4
In the Heat accumulation storage test, 255.1 g of substance were stored in a 500 mL Dewar-container. A storage temperature of 75 °C did not result in an exothermic reaction within 7 days. The SADT is > 75 °C.
sensitivity to mechanical shock
The substance is sensitive to shock with a shock energy of > 30 J.
sensitivity to friction
The substance is not sensitive to friction at 360 N stress.
Description of key information
In the test for thermal sensitivity, no explosion was observed.
In the test for mechanical sensitivity (shock), no explosion was observed using impact energy of 40 J.
In the test for mechanical sensitivity (friction), no explosion was observed using a weight of 360 N and a speed of 10 mm in 0.44 seconds.
DSC: decomposition heat 596 - 664 J/g, ONSET temperature 168 °C
DTA: ONSET temperature 155 °C
UN-Test E.1: No
UN-Test E.2: Low
UN-Test A.1: No
UN-Test C.1: Yes, slowly
UN-Test C.2: Yes, slowly
UN-Test F.3: No
UN-Test H.4: SADT > 75 °C
sensitivity to mechanical shock: sensitive, > 30 J
sensitivity to friction: not sensitive
Key value for chemical safety assessment
- Explosiveness:
- non explosive
Additional information
Two studies are available comprising of several tests conducted.
Most of the tests results were negative, if a positive result was obtained, this result was only weak (e.g. slow deflagration) in nature. Therefore, the substance is rated as non explosive. Nevertheless, a classification as self-decomposing substance may be taken into account.
Justification for classification or non-classification
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
