[No public or meaningful name is available]

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosive properties of explosives

Type of information:

other: Expert statement

Adequacy of study:

key study

Study period:

Study completion date - 22 March 2005.

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Expert statement

Qualifier:

no guideline required

Principles of method if other than guideline:

Expert statement

GLP compliance:

no

Specific details on test material used for the study:

Identity: FAT 40819/A
Description: Red brown powder
Batch number: Red ROE 420 BOP 01/04
Purity: approx. 77 %
Stability of test item: Stable under storage condition
Expiry date: 02 November 2009
Storage conditions: At room temperature.

Parameter:

other: Oxygen Balance

Remarks on result:

other: The oxygen balance is not considered relevant for the evaluation of the explosive properties of this substance as it is not adequately characterised by taking into account carbon, hydrogen and oxygen only and omitting nitrogen, sulphur and chlorine.

Parameter:

other: Calorimetric test

Remarks on result:

other: The total decomposition energy (determined between room temperature and 500°C) was found to be about 382 J/g thus being far below the UN limit of 500 J/g. One broad exothermic heat effect has been found. The onset point was at about 227 °C.

EXPERT STATEMENT

The explosive properties of FAT 40819/A were estimated based on the UN Recommendations on the Transport of Dangerous Goods (Manual of Tests and Criteria, Annex 6, Orange Book, third edition, 1999) where a set of criteria is compiled to identify materials being potential explosives.

 

Reactive groups

The appraisal of the molecular structure indicates that the molecule contains an unsaturated C-C bond and azo groups linked to aromatic rings both of which might be associated with explosive properties according to UN Recommendations and the Handbook of Reactive Chemical Hazards. Other chemical groups associated with explosive properties as compiled in these documents are not present. In absence of other criteria or in case of reasonable doubt with respect to rapid decomposition, this finding would lead to the recommendation for experimental testing.

 

Oxygen Balance

The oxygen balance is not considered relevant for the evaluation of the explosive properties of this substance as it is not adequately characterized by taking into account carbon, hydrogen and oxygen only and omitting chlorine, fluorine, nitrogen, and sulphur.

 

Calorimetric Tests

The exothermic decomposition energy was determined using Differential Scanning Calorimetry in a closed, gold plated high pressure vessel (DSC). The calorimetric test is of special important for the evaluation of compounds containing chemical groups associated with explosive properties. The total decomposition energy (determined between room temperature and 500°C) was found to be about 382 J/g thus being far below the UN limit of 500 J/g. One broad exothermic heat effect has been found. The onset point was at about 227 °C.

 

Conclusion

Based on item 3 as outlined above, FAT 40819/A is not to be classified as explosive material and no experimental determination according to the EC test guideline A.14 has to be performed.

The presence of azo and unsaturated C-C bond seems to pose no risk as demonstrated by the calorimetric test. Thus, it can be concluded beyond a reasonable doubt that FAT 40819/A is not a potential explosive and does not have a potential for rapid energy release. Nevertheless, this judgement is in respect to classification; it does not necessarily mean that any processing hazards can be discounted.

Interpretation of results:

GHS criteria not met

Conclusions:

Based on an expert statement, the test substance is considered to be non-explosive.

Executive summary:

An expert statement was made stating that it could be concluded beyond a reasonable doubt that the test substance is not a potential explosive and does not have a potential for rapid energy release. This was based on the fact that the test substance only had an exothermic decomposition energy of about 382 J/g and that the presence of azo groups and unsaturated C-C bond in the test substance did not seem to pose a risk as was demonstrated by the calorimetric test.

Description of key information

The test substance is not explosive.

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

An expert statement was made stating that it could be concluded beyond a reasonable doubt that the test substance is not a potential explosive and does not have a potential for rapid energy release. This was based on the fact that the test substance only had an exothermic decomposition energy of about 382 J/g and that the presence of azo groups and unsaturated C-C bond in the test substance did not seem to pose a risk as was demonstrated by the calorimetric test.

Justification for classification or non-classification

As the test substance is not explosive, classification is not needed according to the EU Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation (EC) No. 1272/2008.