Registration Dossier

Administrative data

Endpoint:
explosiveness, other
Type of information:
experimental study
Adequacy of study:
key study
Study period:
April 2003
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2003
Report Date:
2003

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
UN Manual of Tests and Criteria: Part I: Classification procedures, test methods and criteria relating to explosives of Class 1
Version / remarks:
Third Revised Edition
Deviations:
not specified
Principles of method if other than guideline:
The assignor requested to carry out the following:
- the UN gap test (detonation)
- The Koenen test (heating under confinement
- the time/pressure test (ignition under confinement)

The detonation properties of Butyl_NENA were determined using the UN gap test, as described in the United Nations Recommendations on the Transport of Dangerous Goods, Manual of Tests and Crieteria, third revised condition, test 2(a). A steel tube with a length of 400 mm, a diameter of 48 mm and a wall thickness of 4 mm was used, After introducing the test substance into the tube, the tube was provided with a PMMA gap with a length of 50 mm. The booster charge, which is placed on top of the gap, consists of the RDX/wax (95/5). The booster charge is ignited using a U8 detonator. The test results are assessed on the basis of the fragmentation of the tube.

The sensitivity to heating under confinement of Butyl-NENA, was determined using the Koenen Test, as Described in the United Nations Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria third revised edition, tests 1(b) and 2 (b). In this test a steel tube is filled with the substance under investigation. The tube is closed with an orifice plate and subsequently subjected to intense heating. The orifice diameter is varied until the limiting orifice diameter at which the tube does not rupture is found. In each test, approximately 27.0 grams of the sample were loaded into the test tube.

Ignition under confinement of Butyl-NENA, was determined using the time/Pressure test (TPT), as described in the United Nations Recommendations on the Transport of the Dangerous Goods, Manual of Tests and Criteria, third revised edition, tests 2(b)(i) and 2(c)(i). This test is used to determine the effects of igniting the substance under confinement in order to determine if ignition leads to a deflagration with explosive violence.
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Specific details on test material used for the study:
Charge no. 07/02
Assay: 99.2%

Results and discussion

Results of test series for explosivesopen allclose all
Key result
Test series:
UN Test series 2
Method:
UN Test 1 (a): UN gap test
Parameter:
fragmented length (cm)
Value:
0
Result:
negative, no explosion
Key result
Test series:
UN Test series 1
Method:
UN Test 2 (b): Koenen test
Parameter:
limiting diameter (mm)
Value:
3.5
Result:
result is considered "+" (positive)
Remarks on result:
other: Result is > 3.0 mm
Key result
Test series:
UN Test series 2
Method:
UN Test 1 (c) (i): Time/pressure test
Parameter:
limiting diameter (mm)
Value:
3.5
Result:
result is considered "+" (positive)
Remarks on result:
other: Result is > 3.0 mm
Key result
Test series:
UN Test series 1
Method:
UN Test 1 (c) (i): Time/pressure test
Parameter:
other: Max Pressure kPa
Remarks:
Max pressure reported a as mean of 3 replicates
Value:
27.7
Result:
result is considered "+" (positive)
Remarks on result:
other:
Remarks:
Because maximum pressure reched is higher than 2070 kPa with a pressure rise time longer than 30 ms, Butyl-NENA, is considered to be sensitive to ignition under confinement in the sense of the criteria of test series 1.
Key result
Test series:
UN Test series 2
Method:
UN Test 1 (c) (i): Time/pressure test
Parameter:
other: Max Pressure kPa
Remarks:
Reported as mean of 3 replicates
Value:
27.7
Result:
result is considered "-" (negative)
Remarks on result:
other:
Remarks:
Because maximum pressure reched is higher than 2070 kPa with a pressure rise time longer than 30 ms, Butyl-NENA, is not considered to be sensitive to ignition under confinement in the sense of the criteria of test series 2.

Applicant's summary and conclusion

Interpretation of results:
unstable explosive based on GHS criteria
Conclusions:
Based on the results of the investigation, according t the criteria specified in the United Nations Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, third revised edition, it is concluded that the investigated sample of Butyl-NENA,has explosive properties in the sense of the criteria of test series 1 & 2.




Executive summary:
   Test Series 1  Test Series 2
 Detonation  not tested no 
 Heating under confinement  yes  yes
 Ignition under confinement  yes  no