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Endpoint:
explosive properties of explosives
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009-11-11 to 2010-07-12
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.14 (Explosive properties)
Deviations:
no
Principles of method if other than guideline:
The test is designed to measure the sensitiveness of solid (including paste-like and geltype) substances to impact.
The BAM fallhammer apparatus (as manufactured by Chilworth Technology Ltd) consists of a cast steel block with base, anvil, column, guides, drop weights, release device and a sample holder. The steel anvil (100 mm diameter by 70 mm height) is screwed to the top of a steel block (230 mm length by 250 mm width by 200 mm height) with a cast base (450 mm length by 450 mm width by 60 mm height). A column, made from seamless drawn steel tube, is secured in a holder screwed on to the back of the steel block. Four screws anchor the apparatus to a solid concrete block (60 cm x 60 cm x 60 cm) such that the guide rails are absolutely vertical and the drop weight falls freely. 5 and 10 kg weights made from solid steel are available for use. The striking head of each weight is of hardened steel and has a minimum diameter of 25 mm.

The sample under test is enclosed in a shock device consisting of two coaxial solid steel cylinders, one above the other, in a hollow cylindrical steel guide ring. The solid steel cylinders are 10 mm diameter by 10 mm height with polished surfaces and rounded edges. The hollow cylinder must have an external diameter of 16 mm, a polished bore of 10 mm and a height of 13 mm. The shock device is assembled on an intermediate anvil (26 mm diameter and 26 mm height) made of steel and centred by a ring with perforations to allow escape of fumes.

Powdered substances are sieved and the sieve fraction < 0.5 mm is used for testing. Pressed, cast or otherwise condensed substances are broken into small pieces and sieved; the sieve fraction from 0.5 mm to 1 mm diameter is used for testing and should be representative of the original substance. Substances normally supplied as pastes should be tested in the dry state where possible or, in any case, following the removal of the maximum possible amount of diluent. Liquid substances are tested with a 1 mm gap between the upper and lower steel cylinders.

A sample is taken with a scoop of 40 mm³ volume. The substance is then placed in the open impact device, which is already in the locating ring on the intermediate anvil. The upper steel cylinder is then placed in position (using an O-ring if necessary). In the interpretation of results of the trial, distinction is made between "no reaction", "decomposition" (change of colour) and "explosion" (crackling, sparking or inflammation). A series of six tests are performed dropping the 10 kg mass from 0.40 m (40 J). If an explosion is obtained during the six tests at 40 J, a further series of 6 tests, dropping a 5 kg mass from 0.15 m (7.5 J), must be performed.
GLP compliance:
yes
Specific details on test material used for the study:
Polyoxypropylene triamine
(39423-51-3) 60-100%
Key result
Parameter:
sensitiveness to impact: impact energy (J)
Value:
40
Remarks on result:
not sensitive to impact using an impact energy of 40 J

The substance was observed to exhibit no reaction at 40 J. The test result is therefore considered negative (-) (according to the EC Classification, Packaging & Labelling of Dangerous Substances in the European Union Part 2, Testing Methods, Jan 97).

Interpretation of results:
GHS criteria not met
Conclusions:
The substance was observed to exhibit no reaction at 40 J. The test result is therefore considered negative (-)
Endpoint:
explosive properties of explosives
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009-11-11 to 2010-07-12
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.14 (Explosive properties)
Deviations:
no
Principles of method if other than guideline:
To determine the effect of heating the substance in a steel tube, closed by orifice plates with differing diameters of hole, to determine whether the substance is liable to explode under conditions of intense heat and defined confinement.

The liquid is loaded in the tube to a height of 60 mm. A series of 3 tests with a 6.0 mm diameter orifice plate is first performed and if no explosions are obtained, a second series of 3 tests is performed with a 2.0 mm diameter orifice plate. If an explosion occurs during either test series, no further tests are required.

Procedure:
Normally the substance is tested as received, although in certain cases e.g. if pressed, cast or otherwise condensed, it may be necessary to test the substance after crushing. For solids, the sample is filled into a tared tube to a height of 55 mm, and then re-weighed. The substance is then filled into the tube in three increments of similar volumes. Each increment is then pressed with a force of 80 N applied to the total cross section of the tube. The threaded collar is slipped onto the tube from below, the appropriate orifice plate is inserted and the nut tightened. The tube is suspended between the two rods in the protective box. When all four burners are burning correctly, a stopwatch is started to measure the time t1 elapsing between ignition of the burners and the occurrence of the first noticeable reaction of the substance and time t2 from the first noticeable reaction to the
end of the reaction. After each trial the fragments of the tube must be collected and weighed.

In the case of liquids and gels, they are loaded into the tube to a height of 60 mm, taking particular care with gels to prevent the formation of voids.
A series of three tests with a 6.0 mm diameter orifice plate is first performed and if no explosions are obtained, a second series of three tests is performed with a 2.0 mm diameter orifice plate. If an explosion occurs during either test series then no further tests are required.

Interpretation of results:
The test result is considered positive if an explosion occurs in either of the above series of tests. The test is conducted according to EC 440/2008 incorporating EC's "Classification, Packaging & Labelling of Dangerous Substances in the European Union" Part 2, Testing methods, Jan '97. Directive 92/69, Annex V to Council Directive 67/548/EC.
GLP compliance:
yes
Specific details on test material used for the study:
Polyoxypropylene triamine
(39423-51-3) 60-100%
Key result
Parameter:
thermal sensitivity - Koenen test: diameter of the orifice plate
Remarks on result:
not thermal sensitive if heated under defined confinement

The substance did not exhibit an explosion during any of the tests and the tube remained unchanged. The test result is therefore considered negative.

Interpretation of results:
GHS criteria not met
Conclusions:
The substance did not exhibit an explosion during any of the tests and the tube remained unchanged. The test result is therefore considered negative.

Description of key information

The test substance was considered non explosive based on the Koenen Tube and BAM Fallhammer test following EU test method A.14 (Baker, 2010).

Key value for chemical safety assessment

Explosiveness:
non explosive

Additional information

The test substance was tested in the BAM fallhammer test (shock) and the Koenen tube test (thermal stability).

Justification for classification or non-classification

A GLP study in accordance with EU test method A.14 concluded that the substance is non explosive. The absence of structural alerts and the daily handling of this substance is in line with these results. Based on this information it can be concluded that the subtance is non explosive.