trisodium 3-[(E)-2-(4-{[4-chloro-6-({2-[(4-{[4-(ethenesulfonyl)phenyl]amino}-6-fluoro-1,3,5-triazin-2-yl)amino]propyl}amino)-1,3,5-triazin-2-yl]amino}-5-sulfonaphthalen-1-yl)diazen-1-yl]naphthalene-1,5-disulfonate

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:

11 July 2006

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods with acceptable restrictions

Qualifier:

no guideline required

Principles of method if other than guideline:

Expert statement

GLP compliance:

no

Parameter:

other: calorimetric test based on expert statement

Remarks on result:

other: FAT 40826/A is not a potential explosive and does not have a potential for rapid energy release

EXPERT STATEMENT

The explosive properties of FAT 40826/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 azo group and an unsaturated C-C linkage 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. Various exothermic heat effects were observed. The total decomposition energy (determined between room temperature and 500°C) was found to be about 219 J/g thus being far below the UN limit of 500 J/g. The onset point of the first peak was at about 160 °C.

 

Conclusion

Based on item 3 as outlined above, FAT 40826/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 usaturated C-C linkage seems to pose no risk as demonstrated by the calorimetric test.

Thus it can be concluded beyond a reasonable doubt that FAT 40826/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, FAT40826/A 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 219 J/g and that the presence of azo groups and unsaturated C-C linkage in the test substance did not seem to pose a risk as was demonstrated by the calorimetric test.

Description of key information

Based on an expert statement, the test substance is considered to be non-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 (RCC 2006). This was based on the fact that the test substance only had an exothermic decomposition energy of about 219 J/g and that the presence of azo groups and unsaturated C-C linkage in the test substance did not seem to pose a risk as was demonstrated by the calorimetric test.

Justification for classification or non-classification

The test substance has been considered to be non-explosive based on the expert statement, hence does not warrant classification according to the EU Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation (EC) No. 1272/2008.