Trifluoromethanesulphonic 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:

From 04 June 2012 to 05 October 2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Deviations:

yes

Remarks:

only three test for thermal sensitivity using a 2 mm orifice were conducted in order to minimise the consumption of test item and release of toxic gases.

GLP compliance:

yes (incl. QA statement)

Remarks:

11-04-11

Key result

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks on result:

not thermal sensitive if heated under defined confinement

Key result

Parameter:

sensitiveness to impact: impact energy (J)

Remarks on result:

not sensitive to impact using an impact energy of 40 J

All observations are presented in the following table.

Method	number of conducts	loading	number of positive reactions	result
Thermal Sensitivity	3 with 2 mm	27 cm^3	0	not explosive
Mechanical Sensitivity (shock)	6 with 40 J	40 mm^3	0	not explosive

Excessive fuming was observed during the test for thermal sensitivity, but the test item didn’t ignite in any case.

As the test item releases highly toxic gases (hydrofluoric acid, sulphur- and carbon oxides) when exposed to high temperatures and explosive properties were not to be expected, regarding the chemical structure of the test item, only three test for thermal sensitivity using a 2 mm orifice were conducted in order to minimize the consumption of test item and release of toxic gases.

Interpretation of results:

GHS criteria not met

Conclusions:

The test item is considered as “not explosive under the conditions of guideline EU A.14”.

Executive summary:

The determination of the explosiveness properties was performed according to Method A.14 of Commission Regulation (EC) N° 440/2008 of 30 May 2008 and GLP. A deviation was observed in Thermal sensitivity test. As the test item releases highly toxic gases ( hydrofluoric acid, sulphur- and carbon oxides) when exposed to high temperatures and explosive properties were not to be expected, regarding the chemical structure of the test item, only three test for thermal sensitivity using a 2 mm orifice were conducted in order to minimize the consumption of test item and release of toxic gases. This deviation hasn't effect on the results of the test.

The method following EU A.14 provides a scheme of testing to determine whether a solid or a pasty substance presents a danger of explosion when submitted to the effect of a flame (thermal sensitivity), or to shock or friction (sensitivity to mechanical stimuli), and whether a liquid substance presents a danger of explosion when submitted to the effect of a flame or shock. For safety reasons, before performing the main tests, very small samples (circa 10 mg) of the substance are subjected to heating without confinement in a gas flame, to shock between hammer and anvil and to friction by the use of a mortar with pestle.

The thermal sensitivity test involves heating the substance in a steel tube, closed by orifice plates with differing diameters of hole, to determine whether the substance is liable to explode under conditions of intense heat and defined confinement.

The mechanical sensitivity test (shock) involves subjecting the substance to the shock from a specified mass dropped from a specified height.

The mechanical sensitivity test (friction) wasn't conducted as the test item is a liquid.

No signs of an explosive reaction could be observed in any of the tests.Therefore, the test item Trifluoromethanesulfonic acid is considered as “not explosive under the conditions of guideline EU A.14”.

Description of key information

Experimental determination of the explosive properties: test item not explosive.

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

The determination of the explosiveness properties was performed according to Method A.14 of Commission Regulation (EC) N° 440/2008 of 30 May 2008 and GLP. A deviation was observed in Thermal sensitivity test: as the test item releases highly toxic gases ( hydrofluoric acid, sulphur- and carbon oxides) when exposed to high temperatures and explosive properties were not to be expected, regarding the chemical structure of the test item, only three test for thermal sensitivity using a 2 mm orifice were conducted in order to minimize the consumption of test item and release of toxic gases. This deviation hasn't effect on the results of the test.