7-ethoxy-4,6-difluoro-dibenzothiophen-3-ol

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018-11-02 to 2018-11-05

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

GLP compliance:

no

Key result

Parameter:

other: decomposition energy

Value:

381

Remarks on result:

negative (not further specified)

Two DSC measurements in closed glass crucibles showed an endothermal effect in the temperature range of 135 -210 °C and an exothermal effect in the temperature range of 320 - 450 °C with a maximum energy release of 381 J/g.

Table 1: Thermal stability (DSC measurements)

Ident-No.	Weight /mg	Final temperature /°C	Temperature range /°C	Type of effect	Energy /J/g
38319	10.68	500	135-205 320 - 440	Endothermal Exothermal	nr. 381
38322	11.09	500	135-210 330 - 450	Endothermal Exothermal	n.r. 370

n.r.: not relevant

The heat of decomposition in the DCS measurements was below 500 J/g. Therefore, and under the assumption that the test item consisted mainly of organic components the main test on explosive properties was not necessary.

Interpretation of results:

GHS criteria not met

Conclusions:

The test item had no explosive properties.

Executive summary:

A study was conducted according to Regulation (EC) No 440/2008 method A.14 to determine the explosive properties of the test item. A screening test on thermal stability using 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 were used as containers for the test item and the reference. The quantity of heat absorbed or released was measured and recorded. Two DSC measurements in closed glass crucibles showed an endothermal effect in the temperature range of 135 -210 °C and an exothermal effect in the temperature range of 320- 450 °C with a maximum energy release of 381 J/9.The heat of decomposition was below 500 J/g. Therefore the main test on explosive properties had not to be performed. In conclusion, the test item had no explosive properties.

Description of key information

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

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

A study was conducted according to Regulation (EC) No 440/2008 method A.14 to determine the explosive properties of the test item. A screening test on thermal stability using 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 were used as containers for the test item and the reference. The quantity of heat absorbed or released was measured and recorded. Two DSC measurements in closed glass crucibles showed an endothermal effect in the temperature range of 135 -210 °C and an exothermal effect in the temperature range of 320- 450 °C with a maximum energy release of 381 J/g. The heat of decomposition was below 500 J/g. Therefore the main test on explosive properties had not to be performed. In conclusion, the test item had no explosive properties.

Justification for classification or non-classification

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

Based on the test results 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.