2-amino-6-methyl-4-propyl-1,2,4-triazolo[1,5-a]pyrimidin-5(4H)-one

Explosiveness

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

other: UN Test 2(b): “Koenen Test”.

Principles of method if other than guideline:

See 'Any other information on materials and methods incl. tables'.

GLP compliance:

yes (incl. QA statement)

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks on result:

negative (not further specified)

Parameter:

thermal sensitivity - Koenen test: limiting diameter (mm)

Remarks on result:

negative (not further specified)

RESULTS

No explosions occurred and each test was suspended after a total heating period of 5 minutes.

CONCLUSIONS

- No explosions were observed using the 1 mm orifice plates, i.e. Limiting Diameter < 1 mm.

- In accordance with the criteria of UN Test 2(b), the Limiting Diameter is less than 2 mm and the outcome of the test is considered to be “–” (i.e. negative).

- The test substance shows no violent effect on heating under confinement.

Interpretation of results:

GHS criteria not met

Conclusions:

The test substance shows no violent effect on heating under confinement.

Executive summary:

To determine the sensitivity of the test substance to the effect of intense heat under high confinement a study was performed according to UN Test 2(b): “Koenen Test”. In this study no explosions were observed using 1 mm orifice plates, i.e. Limiting Diameter < 1 mm and the outcome of the test is considered to be “–” (i.e. negative).

Reference 2

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: UN Test 2(c)(i): “Time/Pressure Test”.

Principles of method if other than guideline:

See 'Any other information on materials and methods incl. tables'.

GLP compliance:

yes (incl. QA statement)

Parameter:

other: Explosiveness

Remarks on result:

negative (not further specified)

Remarks:

no ability propagate a deflagration with explosive violence.

RESULTS

In all three tests the test substance failed to produce pressures greater than the upper threshold of 2070 kPa, in which case the rise times could not be determined. Overall, the highest pressure achieved was 349 kPa.

CONCLUSIONS

- In all three tests, the upper pressure threshold of 2070 kPa was not achieved.

- In accordance with the criteria of UN Test 2(c)(i), the outcome of the test is considered to be “–” (i.e. negative).

- The test substance shows no deflagration when ignited under confinement.

Interpretation of results:

GHS criteria not met

Conclusions:

The test substance shows no violent effect on ignition under confinement.

Executive summary:

To determine the sensitivity of the test substance to the effect of ignition under high confinement a study was performed according to UN Test 2(c)(i): “time/pressure Test”. In this study no explosions were observed using 1 mm orifice plates, i.e. Limiting Diameter < 1 mm and the outcome of the test is considered to be “–” (i.e. negative).

Description of key information

The test substance is not classified as an explosive based on negative findings in tests for effect of heating under confinement ('Koenen test' type 2(b)) and effect of ignition under confinement (time/pressure test type 2(c)).

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

Test Series 2 from Reference 5.2 has been carried out in order to establish whether or not the test substance is too insensitive for classification as an explosive. This series comprises the following types of test:

- Type 2(a): sensitivity to detonative shock

- Type 2(b): effect of heating under confinement

- Type 2(c): effect of ignition under confinement

Tests of type 2(a) were rendered unnecessary, as the heat of decomposition was determined at <800 J/g. Both the Koenen test (type 2(b)) and the time/pressure test (type 2(c)) produced results which were considered to be “–” (i.e. negative). Therefore the overall conclusion from these tests is that the test substance is not classified as an explosive.