cyproconazole (ISO); (2RS,3RS;2RS,3SR)-2-(4-chlorophenyl)-3-cyclopropyl-1-(1H-1,2,4-triazol-1-yl)butan-2-ol

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:

22 Jan 1996 to 24 Jan 1996

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:

Dec 1992

GLP compliance:

yes (incl. QA statement)

Key result

Test series:

other: not reported

Remarks:

test on thermal sensitivity (effect of a flame)

Method:

other: Steel sleeve test

Parameter:

other: number of fragments with 2 mm and 6 mm plate holes

Result:

negative, no explosion

Remarks on result:

no ignition, explosion, self-heating or visible decomposition

Key result

Test series:

UN Test series 3

Remarks:

test on mechanical sensitivity (shock)

Method:

UN Test 3 (a) (ii): BAM Fallhammer

Parameter:

other: explosion occurrence

Result:

negative, no explosion

Remarks on result:

no ignition, explosion, self-heating or visible decomposition

Key result

Test series:

UN Test series 3

Remarks:

test on mechanical sensitivity (friction)

Method:

UN Test 3 (b) (i): BAM friction apparatus

Parameter:

other: explosion occurrence

Result:

negative, no explosion

Remarks on result:

no ignition, explosion, self-heating or visible decomposition

RESULTS

- Thermal stress:

Exposing the test substance for 300 s to thermal stress did not result in an explosion. None of the test tubes showed a deformation. See also Table 1 and 2 below.

- Mechanical stress by shock:

Exposing the test substance to mechanical stress by shock, did not lead to a· change in the·test substance consistency. See also Table 3 in below.

- Mechanical stress by friction:

Exposing the test substance to mechanical stress by friction, did lead.to change in the test·substance consistency. A discolouration to black was observed, probably caused by the released heat coming from the friction between the two porcelain surfaces. See also Table 4 below.

Table 1 Summary of observations during the submission of test substance to thermal stress

Diameter of orifice (mm)	Time till reaction (s)*	Observations
6	103 120	Flames Smoke
6	102 120	Flames Smoke
6	100 120	Flames Smoke
6	93 115	Flames Smoke
6	103 117	Flames Smoke
6	100 123	Flames Smoke

*Total heating time 300 seconds

Table 2 Summary of the results of the exposure of test substance to thermal stress

Test no	Orifice of the nozzle plate	reaction	explosion
1	6 mm	--	no
2	6 mm	--	no
3	6 mm	--	no
4	2 mm	--	no
5	2 mm	--	no
6	2 mm	--	no

Table 3 Summary of the results of the exposure of test substance to mechanical stress (shock)

Test no	reaction	explosion
1	--	no
2	--	no
3	--	no
4	--	no
5	--	no
6	--	no

Table 4 Summary of the results of the exposure of test substance to mechantcal stress (friction)

Test no	reaction	explosion
1	discolouration	no
2	discolouration	no
3	discolouration	no
4	discolouration	no
5	discolouration	no
6	discolouration	no

Interpretation of results:

GHS criteria not met

Conclusions:

The substance is not considered an explosive, as concluded from the test results on thermal sensitivity (effect of a flame), mechanical sensitivity (shock) and mechanical sensitivity (friction).

Executive summary:

The explosiveness properties of the substance has been studied by assessing the thermal sensitivity (effect of a flame), mechanical sensitivity (shock) and mechanical sensitivity (friction) of the substance in accordance with EU Method A.10 and in compliance with GLP. Test substance is not explosive when exposed to thermal stress. The test substance also does not react under mechanical stress by shock and therefore has not to be seen as explosive. Furthermore the test substance does react under mechanical stress by friction but has not to be seen as explosive. In conclusion, the test substance is not explosive under the conditions of the test.

Description of key information

The test substance did not explode when exposed to heat, mechanical shock or friction, EC Method A.14, Krips 1996.

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

The explosiveness of the substance has been determined based on the thermal sensitivity (effect of a flame), mechanical sensitivity (shock) and mechanical sensitivity (friction) in accordance with EU Method A.14 and in compliance with GLP. It was concluded that the test substance is not explosive.

Justification for classification or non-classification

Based on the available information, classification on explosiveness is not warranted in accordance with EU Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation No. (EC) 1272/2008.