Pyrasulfotole

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:

08 Sept 2003 - 14 Oct 2003

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:

yes (incl. QA statement)

Remarks:

GLP certifying authority: Hess. Ministerium für Umwelt, Landwirtschaft und Forsten, Wiesbaden, Germany

Key result

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Number of fragments:

0

Remarks on result:

not thermal sensitive if heated under defined confinement

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

Final Result

The test item has no danger of explosion according to the explosive properties in the sense of the consolidated version of Guideline 67/548/EEC Annex V, A.14.

 

Screening Result

Thermal stability was evaluated using two DSC-measurements in closed glass crucibles which showed two exothermal effects in the temperature range 220 – 320 C and 360 – 445 C, with an overall decomposition energy of 590 J/g, and 629 J/g respectively. Since the heat of decomposition was above 500 J/g, the test on explosion properties was performed.

 

Individual Results

Mechanical sensitivity (friction): No explosion was observed within 6 tests using a pinload with 360 N.

 

Mechanical sensitivity (shock):

No explosion within 6 tests using a mass of 10 kg falling from a height 0.4 m was observed.

 

Thermal sensitivity:

Three tests were performed with a circular nozzle plate with a hole of 2 mm diameter.

Test no.	Weight of test substance (g)	NozzleWidth (mm)	t1(s)	t2 (s)	Reaction	Appearance;NumberofFragments
1	22.8	2.0	19.4	>300	Burned down	Tube unchanoed
2	23.2	2.0	17.2	>300	Burned down	Tube unchanged
3	23.1	2.0	22.6	>300	Burned down	Tube unchanged

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

t2: duration of reaction and time to any reaction, e.g. rupture of tube or flashing

 

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 substance (pure solid) and the chemical structure 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 is excluded.

 

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 there are no chemical groups present in the molecule which are associated with explosive properties

Description of key information

The test item is not explosive according to EU Method A.14. There are no chemical groups associated with explosive properties present in the molecule.

Key value for chemical safety assessment

Explosiveness:

non explosive

Justification for classification or non-classification

The available data on explosive properties of the test substance do not meet the criteria for classification according to Regulation (EC) 1272/2008, and are therefore conclusive but not sufficient for classification. Based on chemical structure and according to EU Method A.14, the substance is not explosive.