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Administrative data

Endpoint:
explosive properties of explosives
Type of information:
experimental study
Adequacy of study:
key study
Study period:
22 December 2017 - 07 June 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: UN Manual of Tests and Criteria, Appendix 6 "Screening procedures" - Screening procedures for substances which may have explosive properties
Version / remarks:
Rev. 6 (2015)
Deviations:
no
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
(1R,3aS,3bR,9aR,9bS,11aS)-1-ethynyl-1-hydroxy-11a-methyl-1H,2H,3H,3aH,3bH,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-one
EC Number:
608-630-3
Cas Number:
31528-46-8
Molecular formula:
C20H24O2
IUPAC Name:
(1R,3aS,3bR,9aR,9bS,11aS)-1-ethynyl-1-hydroxy-11a-methyl-1H,2H,3H,3aH,3bH,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-one
Test material form:
solid: particulate/powder
Details on test material:
Appearance: Off-white powder
Test item storage: At room temperature

Results and discussion

Small-scale preliminary testsopen allclose all
Key result
Parameter:
other: exothermic decomposition energy [J/g]
Value:
217
Remarks on result:
other: mean of 3 experiments
Remarks:
Substance has no expolosive properties, since the exothermic decomposition energy was below 500 J/g.
Key result
Parameter:
other: onset of the exothermic decomposition [°C]
Remarks on result:
other: exothermic decomposition effects observed at temperatures between 249°C and 478°C

Any other information on results incl. tables

In all three experiments, endothermic and exothermic effects were observed between 225°C and 500°C.  See attached DSC curves.

The first endothermic effect was most likely caused by melting of the test item. The other effects were ascribed to reaction and/or decomposition of the test item. 

In the first experiment three exothermic peaks were observed. The extrapolated onset temperatures of the effects were 249.435°C (first effect), 335.249°C (second effect) and 478.035°C (third effect). The exothermic decomposition energy was 69.725 J/g (first effect), 147.98 J/g (second effect) and 44.142 J/g (third effect). 

In the second experiment two exothermic peaks were observed. The extrapolated onset temperatures of the effects were 248.924°C (first effect) and 337.967°C (second effect). The exothermic decomposition energy was 79.809 J/g (first effect) and 110.58 J/g (second effect). 

In the third experiment two exothermic peaks were observed. The extrapolated onset temperatures of the effects were 249.638°C (first effect) and 338.236°C (second effect). The exothermic decomposition energy was 77.488 J/g (first effect) and 121.35 J/g (second effect).

Since multiple exothermic effects were observed, the sum of the exothermic decomposition was determined (i.e. 261.85 J/g for Experiment 1, 190.39 J/g for Experiment 2 and 198.84 J/g for Experiment 3).

The difference between the minimum and maximum exothermic decomposition energy was >10%, i.e. 38%. Since the exothermic decomposition energy was below 500 J/g, these results were accepted.

After the experiments, a dark brown molten residue remained at the bottom of the sample container and the sample container had expanded. It indicated that melting and reaction and/or decomposition of the test item occurred during the test.

 

INTERPRETATION - DATA EVALUATION

Though all exothermic decomposition onset temperatures were below 500°C, the corresponding exothermic decomposition energies were well below 500 J/g.

In accordance with Table A6.2 of the UN Manual of Tests and Criteria, Appendix 6 "Screening procedures" - Screening procedures for substances which may have explosive properties it is concluded that the acceptance procedure for Class 1 expolsives does not need to be applied.

The substance has no explosive properties.

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Remarks:
and also not classified under CLP
Conclusions:
The substance has no explosive properties.