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Link to relevant study record(s)

Reference
Endpoint:
explosive properties of explosives
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016-08-10 until 2018-05-04
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
At test according to UN-Test series 1 (a) an additional booster from 50 g RDX/wax 95/5 was used due to the too small hole for the detonator in the 160 g booster. The result of this test was not relevant for the final result. At test according to UN-Test series 2 (a) two spacer of each 2.5 cm high was used. The overall high was 5 cm as required by the test procedure.
Reason / purpose for cross-reference:
reference to other study
Qualifier:
according to guideline
Guideline:
UN Manual of Tests and Criteria: Part I: Classification procedures, test methods and criteria relating to explosives of Class 1
GLP compliance:
yes (incl. QA statement)
Parameter:
other: DTA (Screening test)
Remarks:
Determination of decomposition energy
Value:
925
Remarks on result:
other: The test was made twice: 1.) weight: 23.7 mg 238°C to >450°C exothermic type of effect: >910 J/g energy 2.) weight: 25.0 mg 239°C to >450°C exothermic type of effect: >940 J/g energy
Test series:
UN Test series 1
Method:
other: F.3 BAM Trauzl test
Parameter:
other: Increase of volume in mL / 10 g
Value:
9.85
Result:
other: test result"low"
Remarks:
The expansion of the lead block is less than 25 cm2 but more than or equal to 10 cm3 per 10 g of sample.
Test series:
UN Test series 1
Method:
UN Test 1 (a): UN gap test
Parameter:
other: Condition of tube and witness plate after test
Result:
positive, propagation of detonation
Remarks:
The test result is considered as “+” since a hole is punched through the witness plate. There-fore, the substance propagates detonation.
Remarks on result:
other: The tube was ripped more than half and the witness plate was holed after the test.
Test series:
UN Test series 1
Method:
UN Test 1 (b): Koenen test
Parameter:
other: condition of cartridge after test
Result:
negative, no violent effect on heating under confinement
Remarks:
Result: “— “, no effect on heating under confinement with a limiting diameter less than 1 mm.
Remarks on result:
other: No fragments, cartridge unchanged
Test series:
UN Test series 1
Method:
UN Test 1 (c) (i): Time/pressure test
Parameter:
other: time from 690 kPa to 2070 kPa.
Result:
negative, no ability to deflagrate
Remarks:
Result: “—“ , the substance shows no deflagration.
Remarks on result:
not determinable
Remarks:
In all test runs, the pressure was much lower than 2070 kPa. It can be assumed, that also for 5 g of test substance the pressure would be lower than 2070 kPa. Maximal pressure: 563 kPa.
Test series:
UN Test series 2
Method:
UN Test 2 (a): UN gap test
Parameter:
other: Condition of tube and witness plate after test
Result:
negative, not sensitive to detonative shock
Remarks:
The test result is considered as “-“ since the tube is neither fragmented completely nor is the witness plate holed. Therefore, the substance is not sensitive to detonative shock.
Remarks on result:
other: The tube was not and the witness plate was unchanged after the test.
Test series:
UN Test series 2
Method:
UN Test 2 (b): Koenen test
Parameter:
other: condition of cartridge after test
Result:
negative, no violent effect on heating under confinement
Remarks:
Result: “— “, no effect on heating under confinement with a limiting diameter less than 1 mm.
Remarks on result:
other: No fragments, cartridge unchanged
Test series:
UN Test series 2
Method:
UN Test 2 (c) (i): Time/pressure test
Parameter:
other: time from 690 kPa to 2070 kPa.
Result:
negative, no ability to deflagrate
Remarks:
Result: “—“ , the substance shows no deflagration.
Remarks on result:
not determinable
Remarks:
In all test runs, the pressure was much lower than 2070 kPa. It can be assumed, that also for 5 g of test substance the pressure would be lower than 2070 kPa. Maximal pressure: 563 kPa.

In a screening test a DTA was perfomred in order to determine the decomposition energy (see IUCLD 4.23: self-reactive substances). The test was made twice:

1.) weight: 23.7 mg 238°C to >450°C exothermic type of effect: >910 J/g energy

2.) weight: 25.0 mg 239°C to >450°C exothermic type of effect: >940 J/g energy

1) BAM Trauzl test

 Test run  mass  volume before test  volume after test  increase of volume  increase of volume / 10 g
 1  3.1 g 61.4 mL   64.6 mL  3.2 mL  10.3 mL/10 g
 2  3.1 g 62.7 mL  65.6 mL  2.9 mL  9.4 mL/10 g

The expansion of the lead block is less than 25 cm2 but more than or equal to 10 cm3 per 10 g of sample, Therefore the test result is “low”

1) UN gap test Series 1(a)

 Test run mass   tube after test  plate after test
1   99.8 g  ripped more than half  holed
 2  95.8 g  ripped more than half  holed

The test result is considered as “+” since a hole is punched through the witness plate. Therefore, the substance propagates detonation.

1) UN gap test Series 2 (a)

 Test run  mass  tube after test  plate after test
 1  106.7 g  not ripped  unchanged
 2  105.9 g  not ripped  unchanged

The test result is considered as “-“ since the tube is neither fragmented completely nor is the witness plate holed. Therefore, the substance is not sensitive to detonative shock.

2) Koenen-Test (determining the effect of heating under confinement)

 nozzle diameter  sample mass  reaction initiation after  results
 1 mm  10.6 g  48 sec   no fragments, cartridge unchanged
 1 mm  11.1 g  46 sec   no fragments, cartridge unchanged
 1 mm  10.2 g  45 sec   no fragments, cartridge unchanged
 2 mm  12.6 g  29 sec   no fragments, cartridge unchanged
 2 mm  11.9 g  48 sec   no fragments, cartridge unchanged
 2 mm  11.8 g  48 sec   no fragments, cartridge unchanged

Result: “— “, no effect on heating under confinement with a limiting diameter less than 1 mm.

3) Time pressure test (determining the effect of ignition under confinement)

 test run  sample mass  max. pressure   time from 690 kPa to 2070 kPa
  1  3.2 g  438 kPa  -
 2  3.2 g  531 kPa  -
 2  3.2 g  563 kPa  -

In all test runs, the pressure was much lower than 2070 kPa. It can be assumed, that also for 5 g of test substance the pressure would be lower than 2070 kPa.

Result: “—“ , the substance shows no deflagration.

Interpretation of results:
GHS criteria not met
Conclusions:
According to UN Test series 1 and 2 Macrolex Rot B propagates detonation but is not sensitive to shock. Conclusively, according to UN-MTC Macrolex Rot B is too insensitive for acceptance into Class 1 and according to CLP the substance is not an explosive.
Executive summary:

In a preliminary screening test a DTA was performed resulting in a heat of decomposition of >925 J/g in the temperature range of 238 - >450°C. Based on the observed exothermic decomposition which is higher than the threshold value of 800 J/g further test were perfomed. To this end, the explosive properties of Macrolex Rot B were investigated according to UN Test series 1 and 2 of the Recommendations on the Transport of Dangerous Goods - Manual of Tests and Criteria (UN-MTC).

The test of explosive properties consists of three tests: UN gap test / BAM Trauzl test, the Koenen-Test (determining the effect of heating under confinement) and the time pressure test (determining the effect of ignition under confinement).

According to UN Test series 1 and 2 Macrolex Rot B propagates detonation but is not sensitive to shock. Conclusively, according to UN-MTC Macrolex Rot B is too insensitive for acceptance into Class 1 and according to CLP the substance is not an explosive (Bayer AG 2018). Thus, the GHS criteria is not met.

Description of key information

In a preliminary screening test a DTA was performed resulting in a heat of decomposition of >925 J/g in the temperature range of 238 - >450°C. Based on the observed exothermic decomposition which is higher than the threshold value of 800 J/g further test were perfomed. To this end, the explosive properties of Macrolex Rot B were investigated according to UN Test series 1 and 2 of the Recommendations on the Transport of Dangerous Goods - Manual of Tests and Criteria (UN-MTC).

The test of explosive properties consists of three tests: UN gap test / BAM Trauzl test, the Koenen-Test (determining the effect of heating under confinement) and the time pressure test (determining the effect of ignition under confinement).

According to UN Test series 1 and 2 Macrolex Rot B propagates detonation but is not sensitive to shock. Conclusively, according to UN-MTC Macrolex Rot B is too insensitive for acceptance into Class 1 and according to CLP the substance is not an explosive (Bayer AG). Thus, the GHS criteria is not met.

Key value for chemical safety assessment

Explosiveness:
non explosive

Additional information

Justification for classification or non-classification

According to UN Test series 1 and 2 Macrolex Rot B propagates detonation but is not sensitive to shock. Conclusively, according to UN-MTC Macrolex Rot B is too insensitive for acceptance into Class 1 and according to CLP the substance is not an explosive (Bayer AG). Thus, the GHS criteria is not met.