thiamethoxam (ISO); 3-(2-chloro-thiazol-5-ylmethyl)-5-methyl[1,3,5]oxadiazinan-4-ylidene-N-nitroamine

Explosiveness

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

23 Sep 2016 to 14 Feb 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: UN Test 2(b): “Koenen Test”

GLP compliance:

yes

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks on result:

negative (not further specified)

Parameter:

thermal sensitivity - Koenen test: limiting diameter (mm)

Remarks on result:

negative (not further specified)

RESULTS

- Sample preparation: Tested as received.

- During each test, after a time t1 and lasting for a time t2, test material is vented with a flame through the orifice.

Test Number	Orifice Diameter	Tube condition	t1 (s)	t2 (s)
1	1 mm	O	10	30
2	1 mm	O	7	38
3	1 mm	O	7	33

Note: In the absence of a positive result using the 1 mm orifice, no further tests at larger orifice diameters were required.

O = tube recovered unchanged

t1 = Time elapsed from ignition of burners to the first noticeable reaction of the test substance

t2 = Time elapsed from t1 to the end of the reaction.

CONCLUSIONS

- No explosions were observed using the 1 mm orifice plates, i.e. Limiting Diameter < 1 mm.

- In accordance with the criteria of UN Test 2(b), the Limiting Diameter is less than 2 mm and the outcome of the test is considered to be “–” (i.e. negative).

- The test substance shows no violent effect on heating under confinement.

Interpretation of results:

GHS criteria not met

Conclusions:

The test substance shows no violent effect on heating under confinement.

Executive summary:

To determine the sensitivity of the test substance to the effect of intense heat under high confinement a study was performed according to UN Test 2(b) and in compliance with GLP. In this study no explosions were observed using 1 mm orifice plates, i.e. Limiting Diameter < 1 mm and the outcome of the test is considered to be “–” (i.e. negative).

Reference 2

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

23 Sep 2016 to 14 Feb 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: UN Test 2(c)(i): “Time/Pressure Test”

GLP compliance:

yes

Parameter:

other: Explosiveness

Remarks on result:

negative (not further specified)

Remarks:

no ability propagate a deflagration with explosive violence

RESULTS

The results of three tests carried out on the test substance are tabulated below:

Test Number	Rise Time (ms)	Maximum Pressure (kPa)
1	816.8	6052
2	596.4	5099
3	967.5	6895

In all cases the upper pressure threshold (2070 kPa) was achieved and the minimum rise time obtained was 596.4 ms.

CONCLUSIONS

- The minimum time for the pressure to rise from 690 kPa to 2070 kPa = 596.4 ms.

- In accordance with the criteria of UN Test 2(c)(i), the minimum rise time is > 30 ms and so the outcome of the test is considered to be “–” (i.e. negative).

- The test substance shows only slow deflagration when ignited under confinement.

Interpretation of results:

GHS criteria not met

Conclusions:

The test substance shows only slow deflagration when ignited under confinement.

Executive summary:

To determine the effects of ignition under confinement, in order to establish the ability of the test substance to propagate a deflagration with explosive violence, a test was carried out in accordance with UN Test 2(c)(i) and in compliance with GLP. In this study the test substance showed only slow deflagration when ignited under confinement.

Description of key information

non explosive, UN Test 2(b), UN Test 2(c)(i), UN Test F.3, Jackson 2017

Key value for chemical safety assessment

Explosiveness:

non explosive

Justification for classification or non-classification

Based on available information, the test substance is not classified as an Explosive in accordance with EU Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation No. (EC) 1272/2008.