4-Ethyl-2’-fluoro-4’-bromobiphenyl

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:

2019-03-05 to 2019-03-06

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: Thermal stability

Remarks on result:

negative (not further specified)

Key result

Test series:

other: OECD 113

Method:

other: Thermal stability

Parameter:

other: decomposition energy

Value:

107

Result:

result is considered "-" (negative)

Thermal stability

The first DSC measurement in a closed glass crucible showed an endothermal effect in the temperature range of 25-40 °C and two exothermal effects. The first exothermal effect occurred in the temperature range of 345 - 400 °C with an energy release of 29 J/g, directly followed by the second exothermal effect in the temperature range of 400 - 480 °C with an energy release of 78 J/g. Starting at around 370 °C the course of the baseline indicated a pressure build up. The second DSC measurement in a closed glass crucible showed an endothermal effect in the temperature range of 30 - 45 °C and no further endothermal or exothermal effects up to the final measurement temperature of 500 °C. Starting at around 390 °C the course of the baseline indicated a pressure build up.

 

Table 1: Thermal stability (DSC measurements)

Ident-No.	Weight /mg	Final temperature /°C	Temperature range rc	Type of effect	Energy /J/g
38535	11.24	500	25-40 345 – 400 400 - 480	Endothermal Exothermal Exothermal	n.r. 29 78
38542	14.09	500	30-45	Endothermal	n.r.

n.r.: not relevant

Interpretation of results:

GHS criteria not met

Conclusions:

The test item has no explosive properties. The heat of decomposition in the DCS measurements was below 500 J/g.

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. The heat of decomposition was below 500 J/g. In conclusion, as the heat of decomposition was below 500 J/G it was concluded that the test item had no explosive properties in the sense of the European Commission Regulation (EC) No 440/2008, Method A.14.

Description of key information

The test item has no explosive properties. The heat of decomposition in the DCS measurements was below 500 J/g.

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 (reference 4.14 -1). 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. The heat of decomposition was below 500 J/g. In conclusion, as the heat of decomposition was below 500 J/g it was concluded that the test item had no explosive properties in the sense of the European Commission Regulation (EC) No 440/2008, Method A.14.

Justification for classification or non-classification

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) No 1480/2018, the substance is not considered to be classified for explosive properties.