1-ethoxy-2,3-difluorobenzene

Explosiveness

Link to relevant study record(s)

Reference

Reference 1

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

Reference 2

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2000-09-22 to 2000-09-25

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:

EEC Commission Directive 92/69 - A14 method (1992)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Test series:

UN Test series 3

Method:

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

Parameter:

limiting impact energy (J)

Value:

7.5

Result:

negative, no explosion

Key result

Test series:

UN Test series 2

Method:

UN Test 2 (b): Koenen test

Parameter:

limiting diameter (mm)

Value:

2

Result:

negative, no explosion

Thermal sensitivity (Koenen test)

Safety in handling test:

A small quantity of the test item was submitted to a flame from a gas burner. An inflammation of the test item was observed.

Ten g of test item, using a tube with a hole of 2 mm diameter, was submitted to a flame from a gas burner: from 1 minute 40 seconds, smoke and intermittent flames were observed and from 3 minutes, flames were only recorded.

No sign of explosion was recorded.

 

Main test:

Gas rate: 3.2 litre/minute

Volume of test item to reach 6 cm height in the test tube: 27 mL

Assay No.	Volume of test item (mL)	Nozzle plate opening (mm)	Effect on steel tube
1	27	6	no explosion
2	27	6	no explosion
3	27	6	no explosion
4	27	2	no explosion
5	27	2	no explosion
6	27	2	no explosion

 

Observed reactions:

1) Assays using a tube with a hole of 6 mm diameter

No sign of explosion or inflammation were observed during the 5-minute period.

Assay No. 1:

No observation during the 5-minute period.

Assay No. 2:

No observation during the 5-minute period.

Assay No. 3:

No observation during the 5-minute period.

2) Assays using a tube with a hole of 2 mm diameter

No sign of explosion or inflammation were observed during the 5-minute period.

Assay No. 1:

No observation during the 5-minute period.

Assay No. 2:

No observation during the 5-minute period.

Assay No. 3:

At 4 minutes 50, flame was observed for 2 seconds.

Results:

Six negative assays were recorded. No heat sensitivity was noted with the test item.

 

MECHANICAL SENSITIVITY (Fallhammer test)

Experimental conditions:

Room temperature: 20.3°C

Relative humidity: 60%

Atmospheric pressure: 97.3 kPa

Preparation of the test item:

The test item was used as supplied.

Safety in handling test:

A small quantity of the test item was submitted to a shock by means of a metallic device.

No sign of explosion was recorded.

Main test:

Volume of test item to reach 1 mm height in the cylinder: 70 μL

Volume (μL)	Impact		Assay No.
	height (m)	weight (kg)	1	2	3	4	5	6
70	0.15	5	No explosion	No explosion	No explosion	No explosion	No explosion	No explosion

 

Observed reactions:

No sign of explosion was observed.

Results:

Six negative assays were recorded. No shock sensitivity was noted with the test item.

Reference item (RDX sieved and dried)

Volume (mm^3)	Impact		Assay No.
	height (m)	weight (kg)	1	2	3	4	5	6
40	0.40	10	explosion
40	0.15	5	No explosion	No explosion	No explosion	No explosion	Explosion**

 

Observed reactions:

* loud report, inflammation.

** loud report.

Results

The reference item is considered to have explosive properties in our experimental conditions.

CONCLUSION

The test item is not considered to have explosive properties under our experimental conditions.

Interpretation of results:

GHS criteria not met

Conclusions:

The test item is not considered to have explosive properties under the applied experimental conditions.

Executive summary:

A test on explosive properties according to Regulation (EC) No 440/2008 Method A.14 was performed to determine the explosive properties of the test item. After safety-in-handling tests to establish safe conditions for the performance the main test series was conducted. The impact sensitivity of the test item was determined in the BAM Fallhammer test with impact energy of 7.5 J. In six independent measurements no explosion occurred. The sensitiveness of the test item on the effect of intense heat under high confinement was tested in a steel tube with an orifice with diameter of 6.0 mm and 2.0 mm, respectively. Three independent measurements with each diameter were performed and as overall result no explosion was observed. Therefore, it is considered that the test item has no potential for explosive properties.

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

In accordance with column 2 of REACH Annex VII, the explosiveness study does not need to be conducted as there are no chemical groups associated with explosive properties in the molecule (reference 4.14-1).

Additionally, a test on explosive properties according to Regulation (EC) No 440/2008 Method A.14 was performed to determine the explosive properties of the test item. After safety-in-handling tests to establish safe conditions for the performance the main test series was conducted. The impact sensitivity of the test item was determined in the BAM Fallhammer test with impact energy of 7.5 J. In six independent measurements no explosion occurred. The sensitiveness of the test item on the effect of intense heat under high confinement was tested in a steel tube with an orifice with diameter of 6.0 mm and 2.0 mm, respectively. Three independent measurements with each diameter were performed and as overall result no explosion was observed. Therefore, it is considered that the test item has no potential for explosive properties (reference 4.14-2).

Justification for classification or non-classification

Classification, Labelling, and Packaging Regulation (EC) No 1272/2008

Based on the structure of the molecule and taking into account the provisions laid down in Regulation (EC) No 1272/2008 (CLP), as amended for the twelfth time in Regulation (EU) 2019/521, the test item does not have to be classified with respect to explosiveness.