clothianidin (ISO); (E)-1-(2-chloro-1,3-thiazol-5-ylmethyl)-3-methyl-2-nitroguanidine

Explosiveness

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Study period:

23 Jul - 13 Aug 2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.6316 (Explodability)

Qualifier:

according to guideline

Guideline:

other: OECD 113

Version / remarks:

Pre-test: thermal stability

GLP compliance:

yes (incl. QA statement)

Remarks:

Hess. Ministerium für Umwelt, Landwirtschaft und Forsten, Wiesbaden, Germany

Parameter:

sensitiveness to friction: friction load (N)

Remarks on result:

not sensitive to friction using a friction load of 360 N

Parameter:

sensitiveness to impact: impact energy (J)

Remarks on result:

not sensitive to impact using an impact energy of 40 J

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks:

diameter 2 mm

Number of fragments:

0

Remarks on result:

not thermal sensitive if heated under defined confinement

Preliminary test result

The DSC-measurement in a closed glass crucible in a high pressure crucible showed an endothermic effect in the temperature range 160-195 °C and an exothermal effect in the temperature range of 195-265 °C with an overall energy of 1620 J/g and 1748 J/g, respectively. The heat of decomposition was above 500 J/g. Therefore further tests on explosive properties had to be performed.

Individual results

Mechanical sensitivity (friction): The test item was sieved < 0.5 mm. No explosion occurred within 6 tests using a pinload of 360 N, only a discoloration of the test item was observed in 5 of 6 tests.

 

Mechanical sensitivity (shock):

The test item was sieved < 0.5 mm. No explosion within 6 tests using a mass of 10 kg falling from a height of 0.4 m was observed, only decomposition in 3 of 6 tests was observed.

 

Thermal sensitivity:

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

Sample weight (g)	Reaction time t1 (s)	Reaction time t2 (s)	Reaction	Appearance, number of fragments
23.62	15	> 300	Flame	0
23.00	13	> 300	Flame	0
23.05	14	> 300	Flame	0

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

t2: time to main 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.

Final result:

The test item Clothianidin technical substance had no explosive properties under the test conditions in the sense of EU Method A.14. and in the sense of the US EPA Guideline OCSPP 830.6316.

Interpretation of results:

GHS criteria not met

Reference 2

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

14 Jun - 14 Aug 2000

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

GLP compliance:

no

Parameter:

sensitiveness to friction: friction load (N)

Remarks on result:

not sensitive to friction using a friction load of 360 N

Parameter:

sensitiveness to impact: impact energy (J)

Remarks on result:

not sensitive to impact using an impact energy of 40 J

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks:

diameters used 2 mm and 6 mm

Number of fragments:

0

Remarks on result:

not thermal sensitive if heated under defined confinement

Individual results

Mechanical sensitivity (friction): six times negative

Mechanical sensitivity (shock): six times negative, no optical change in product apparent

Koenen test: 3 trials with nozzle diameter 2 mm, reaction initiation after 11 -13 s, result: no fragments, cartridge unchanged; 3 trials with nozzle diameter 6 mm, reaction initiation after 11 -12 s, result: no fragments, cartridge unchanged

Final result: no explosive properties under the test conditions in the sense of EC Method A.14.

Description of key information

not explosive

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

The substance demonstrates no explosive properties in the sense of the European Commission Regulation (EC) No. 440/2008, Method A. 14. It is confirmed by the results of an earlier supporting experiment (EC A.14).

Justification for classification or non-classification

The available data on explosive properties of the test substance is not sufficient for non-classification according to Regulation (EC) 1272/2008 (CLP). The reason for no classification is "data lacking".