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

Explosiveness

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

11 September 2015 - 29 October 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods

Qualifier:

according to guideline

Guideline:

other: ASTM E537 using differential scanning calorimetry

GLP compliance:

yes

The thermogram shows a large endothermic peak at approximately 330 °C which is followed by a smaller exothermic peak over in the range 367 - 435 °C. The total normalized energy output from the exothermic event, i.e. the heat of decomposition, is 124 J/g.

Interpretation of results:

GHS criteria not met

Conclusions:

The heat of decomposition was determined to be 124 J/g. As the heat of decomposition has been determined to be less than 500 J/g then no further testing is required to establish the explosive properties of the test substance.

Executive summary:

As a preliminary test, the heat of decomposition was determined using differential scanning calorimetry according to ASTM E537. The heat of decompostion was determined to be 124 J/g.  As the heat of decomposition has been determined to be less than 500 J/g then no further testing is required to establish the explosive properties of the test substance.  

Reference 2

Endpoint:

explosive properties of explosives

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is an organic substance or mixture containing chemical groups associated with explosive properties, but the exothermic decomposition energy is less than 500 J/g and the onset of exothermic decomposition is below 500°C

Justification for type of information:

It is stated in Annex VII, column 2 of the REACH Regulation that a study does not need to be conducted if the organic substance contains chemical groups associated with explosive properties but the exothermic decomposition energy is less than 500 J/g and the onset of exothermic decomposition is below 500 °C.

As a preliminary test, the heat of decomposition was determined using differential scanning calorimetry according to ASTM E537. The heat of decomposition was determined to be 124 J/g (Jackson, 2015).  In addition, the decomposition of the test item occurs upon melting at a temperature of 321.3 °C (O'Connor, 2015b).

As the heat of decomposition is below 500 J/g and the decomposition temperature is below 500 °C then no further testing is required to determine the explosive properties of the test item.

Description of key information

As a preliminary test, the heat of decomposition was determined using differential scanning calorimetry according to ASTM E537. The heat of decomposition was determined to be 124 J/g (Jackson, 2015).  In addition, the decomposition of the test item occurs upon melting at a temperature of 321.3 °C (O'Connor, 2015b).

As the heat of decomposition is below 500 J/g and the decomposition temperature is below 500 °C then no further testing is required to determine the explosive properties of the test item.  

Key value for chemical safety assessment

Explosiveness:

non explosive