Desmedipham

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosiveness, other

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2012-07-20 to 2012-10-16

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.6316 (Explodability)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Deviations:

no

GLP compliance:

yes

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 on result:

not thermal sensitive if heated under defined confinement

Key result

Parameter:

sensitiveness to friction: friction load (N)

Value:

0

Remarks on result:

not sensitive to friction using a friction load of 360 N

Thermal Stability

The DSC-measurement with the test item in a closed glass crucible showed an endothermaleffect in the temperature range of 105 - 135°C and a broad exothermal effect in the temperature range of 200 - 430°C with an energy of 577 Jlg.A graphical presentation of the DSC run No. 33052 is given in the study report.

Explosive Properties

Due to the high decomposition energy which was found in the DSC measurements in closedcrucibles of > 500 J/9, the main test on explosion properties was performed.

Mechanical Sensitivity (Friction) :No explosion occurred within 6 tests using a pinload of 360 N, only a discoloration of the test itemwas observed.

Mechanical Sensitivity (Shock) :No explosion within 6 tests using a mass of 10 kg falling from a height of 0.4 m was observed.

Thermal Sensitivity:Three tests with a circular nozzle plate with a hole of 2 mm diameter were performed. Thefollowing table gives the results of the tests on thermal stability.

Test no.	Weight of test item (g)	Nozzle width (mm)	(s)	(s)	Reaction	Appearance; Number of Fragments
1	19.2	20	39	> 300	Flame	O
2	19.1	20	38		Flame	O
3	19.1	2.0	38	> 300	Flame	o

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

t₂: time to main reaction, e.g. rupture of tube or flashing

O: tube unchanged

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 item 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.

Interpretation of results:

GHS criteria not met

Conclusions:

The test item Desmedipham), technical substance, has no explosive properties under the test conditions in the sense of the European Commission Regulation (EC) No. 440/2008, Method A.14. and in the sense of the US EPA Product Properties Test Guideline OCSPP 830.6316.

Executive summary:

The explosive properties of Desmedipham, technical substance, were determined according to the European Commission Regulation (EC) No. 440/2008

Part A: Methods for the determination of physico-chemical properties, A.14.Explosive properties, and US EPA Product Properties Test Guideline OCSPP 830.6316 (1996), Explodability

Result:

The test item Desmedipham, technical substance, has no explosive properties under the test conditions in the sense of the European Commission Regulation (EC) No.44012008, Method 4.14. and in the sense of the US EPA Product Properties Test Guideline OCSPP 830.6316.

Description of key information

The test item Desmedipham, technical substance, has no explosive properties under the test conditions

Key value for chemical safety assessment

Explosiveness:

non explosive