(4'-methyl-3-fluoro[1,1'-biphenyl]-4-yl)-boronic acid

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:

15.08.-15.09.2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Version / remarks:

2008

Deviations:

no

GLP compliance:

no

Key result

Parameter:

sensitiveness to friction: friction load (N)

Remarks on result:

not sensitive to friction using a friction load of 360 N

Key result

Parameter:

sensitiveness to impact: impact energy (J)

Remarks on result:

not sensitive to impact using an impact energy of 40 J

Key result

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks on result:

not thermal sensitive if heated under defined confinement

Preliminary test - thermal stability

A DSC measurement in a closed glass crucibles showed an endothermal effect in the temperature range of 130 - 180°C and two exothermal effects in the temperature range of 180 - 290°C and 390 - 435°C with an overall energy release of 581 J/g. Above 435 °C the baseline became ambiguous due to pressure built up.

Table 1: Thermal stability (DSC measurements)

Ident-No.	Weigth/mg	Final temperature / °C	Temperature range / °C	Type of effect	Energy / J/g
36491	7.78	500	140 – 180 180 – 290 390 – 435	Endothermal Exothermal Exothermal	n.r. 516 65

 

Explosive properties:

Since the heat of decomposition was above 500 J/g, the main test on explosive properties had to be performed.

Mechanica/ sensitivity (friction):

The test item was sieved (mesh size 0.5 mm) before the measurement. No explosion occurred within 6 tests using a pinload of 360 N, only a discoloration of the test item was observed in all tests.

 

Mechanical sensitivity (shock):

The test item was sieved (mesh size 0.5 mm) before the measurement. No explosion within 6 tests using a mass of 10 kg falling from a height of 0.4 m was observed.

 

Thermal sensitivity:

Three tests were performed with a circular nozzle plate with a hole of 2 mm diameter. No explosion was observed. Table 2 gives the results of the thermal sensitivity.

 

Test no	Weight of test item/g	Nozzle width/mm	t1 [s]	t2 [s]	Reaction	Appearance; number of fragments
1	18.9	2.0	20	>300	Flame	O
2	18.9	2.0	20	>300	Flame	O
3	18.9	2.0	19	>300	Flame	O

 

t1: time to any reaction, e.g. whistle or flame

t2: time to main reaction, e.g. rupture of tube or flashing

O : tube unchanged

 

The test on thermal sensitivity carried out with a nozzle with a diameter of 2.0 mm showed no explosion. Compared to the nozzle with a diameter of 6.0 mm the venting area of the nozzle with 2.0 mm is smaller by an order of magnitude. Additionally the physical state of the test item excludes the enrichment of high-energy components caused by evaporation of volatile solvents. Due to these facts an explosion with a nozzle width of 6.0 mm was excluded.

Interpretation of results:

GHS criteria not met

Conclusions:

The test item is not explosive.

Executive summary:

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 had no explosive properties in the sense of the European Commission Regulation (EC) No. 440/2008, Method A. 14.

Key value for chemical safety assessment

Explosiveness:

non explosive

Justification for classification or non-classification

Based on the result, the substance is not considered to be classified for explosiveness according to Classification, Labelling, and Packaging Regulation (EC) No 1272/2008.