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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
explosiveness
Type of information:
experimental study
Adequacy of study:
key study
Study period:
26 July 2011 - 28 July 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2011
Report date:
2011

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.14 (Explosive properties)
Deviations:
no
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
5,7-dimethoxy-[1,2,4]triazolo[1,5-a]pyrimidin-2-amine
EC Number:
603-562-0
Cas Number:
13223-43-3
Molecular formula:
C7H9N5O2
IUPAC Name:
5,7-dimethoxy-[1,2,4]triazolo[1,5-a]pyrimidin-2-amine
Details on test material:
Batch No: L100740

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:
not measured/tested
Parameter:
other: Explosive (not specified)
Remarks:
migrated information
Remarks on result:
negative (not further specified)

Any other information on results incl. tables

Examination of the structural formula for the sample indicates:

• The structure contains contiguous nitrogen atoms which are associated with explosive properties (Table 7.1).

• The oxygen is not bound in energetic functional groups – it is bound in C-O-C groups which do not possess explosive behaviour. The oxygen balance is -135 – above the criteria for consideration (-200). However, there would be expected to be some energetic behaviour associated with the nitrogen ring atoms (although this would not be expected to be a particularly dramatic behaviour as would be expected for a tetrazole).

• Differential scanning calorimetry conducted on the sample indicated that the total heat of decomposition is < 500 J.g-1.

Based on the results of the differential scanning calorimeter test, it is beyond reasonable doubt that the material will not exhibit explosive properties. The conduct of furtherexplosive properties testing is therefore not considered appropriate.

The full profile for the experiment is provided in Graph 1 (attached).

The sample was observed to undergo an exothermic event from 198.7°C which had a heat of decomposition of -282.1 J.g-1. A second exothermic event was then observed to commence from 275.1°C which had a heat of decomposition of -72.7 J.g-1. No further significant energetic events were noted up to 500°C.

The total heat of decomposition was therefore -354.8 J.g-1.

Applicant's summary and conclusion

Interpretation of results:
non explosive
Remarks:
Migrated information
Conclusions:
Based on examination of the structural formula and the results of the differential scanning calorimeter test, it is beyond reasonable doubt that the material will not exhibit explosive properties. The conduct of further explosive properties testing was therefore not considered appropriate.
Executive summary:

A GLP-compliant study has been conducted in compliance with EU method A14 of Directive 92/69/EEC. Based on examination of the structural formula and the results of the differential scanning calorimeter test, it is beyond reasonable doubt that the material will not exhibit explosive properties.