2-(4-Bromphenyl)-5-butyl-1,3-dioxane, trans-

Explosiveness

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

explosive properties of explosives

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Reference 2

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: OECD 113 Screening test for thermal stability and stability in air

Deviations:

no

GLP compliance:

no

Key result

Parameter:

other:

Remarks:

thermal stability

Remarks on result:

negative (not further specified)

Thermal stability

A first DSC-measurement in a closed glass crucible with the test item showed an endothermal effect in the temperature range of 45 - 65 °C and two exothermal effects. The first exothermal effect occurred in the temperature range of 140- 180 °C with an energy release of 16 J/g. The second exothermal effect in the temperature range of 330 - 425 °C showed an energy release of 289 J/g. Therefore an overall energy release of 305 J/g was observed in this DSC measurement. No further exothermal or endothermal effect was observed up to the final measurement temperature of 500 °C. Above 425 °C the course of the baseline indicated a pressure build up in the closed glass crucible.

 

A second DSC-measurement in a closed glass crucible with the test item showed an endothermal effect in the temperature range of 45 - 70 °C and an exothermal effect in the temperature range of 330 - 400 °C with an energy release of 163 J/g. No further exothermal or endothermal effect was observed up to the final measurement temperature of 500 °C. Above 395 °C the course of the baseline indicated a pressure build up in the closed glass crucible.

 

Explosive properties

The heat of decomposition was below 500 J/g. Therefore the main test on explosive properties was not necessary.

Interpretation of results:

GHS criteria not met

Conclusions:

The heat of decomposition of the test item was determined to be below 500 J/g.

Executive summary:

A study was conducted in accordance with Regulation (EC) No 440/2008, A14 and OECD TG 113 in order to determine the potential for explosive properties of the test item. Therefore, as a screening method a differential scanning calorimetry (DSC) under nitrogen was performed. The test item and the reference were heated up from ambient to the final temperature at a constant heating rate (3 K/min) in a defined atmosphere (nitrogen). Closed crucibles are used as containers for the test item and the reference. The quantity of heat absorbed or released is measured and recorded. In two individual runs the heat of decomposition was determined to be below 500 J/g. Thus, according to the screening criteria of the Recommendations on the Transport of Dangerous Goods / Manual of Tests and Criteria (ST/SG/AC.10/11, Rev.6, 2015, p. 488) the test item has no explosive properties and no full test needs to be conducted.

Description of key information

The test item has no explosive properties (reference 4.14 -1).

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

In accordance with column 2 adaptation statement of Annex VII Regulation (EC) No 1907/2006 (REACH), the determination of the explosive properties (as required in section 7.11 of Annex VII) was waived. The substance does not contain chemical groups assigned with explosive properties and the exothermic decomposition energy was determined to be below 500 J/g. Thus in accordance with the criteria as laid down in Recommendations on the Transport of Dangerous Goods / Manual of Tests and Criteria (ST/SG/AC.10/11, Rev.6, 2015, p. 488) no main study was conducted and it can be concluded that this substance has no explosive properties.

A study was conducted in accordance with Regulation (EC) No 440/2008, A14 and OECD TG 113 in order to determine the potential for explosive properties of the test item. Therefore, as a screening method a differential scanning calorimetry (DSC) under nitrogen was performed. The test item and the reference were heated up from ambient to the final temperature at a constant heating rate (3 K/min) in a defined atmosphere (nitrogen). Closed crucibles are used as containers for the test item and the reference. The quantity of heat absorbed or released is measured and recorded. In two individual runs the heat of decomposition was determined to be below 500 J/g. Thus, according to the screening criteria of the Recommendations on the Transport of Dangerous Goods / Manual of Tests and Criteria (ST/SG/AC.10/11, Rev.6, 2015, p. 488) the test item has no explosive properties and no full test needs to be conducted.

Justification for classification or non-classification

Classification, Labelling, and Packaging Regulation (EC) No 1272/2008

Based on the chemical structure and taking into account the provisions laid down in Regulation (EC) No 1272/2008, as amended for the twelfth time in Regulation (EC) 2019/521, the substance is not considered to be classified for explosiveness.