Pentasodium bis[5-[(4-amino-6-chloro-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-[(2-hydroxy-5-nitrophenyl)azo]naphthalene-2,7-disulphonato(4-)]chromate(5-)

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosiveness

Type of information:

other: Expert statement

Adequacy of study:

key study

Study period:

2016-03-23

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Well documented expert statement

Qualifier:

according to guideline

Guideline:

other: CLP, Annex I, Part 2, paragraphs 2.1.4.2 and 2.1.4.3

Qualifier:

according to guideline

Guideline:

other: Appendix 6 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria

Qualifier:

according to guideline

Guideline:

other: Technical Guidance Document on the Information Requirements for REACH, Part 2 EWG 1-7, REACH Implementation Project (RIP) 3.3 Phase 2, chapter 7.1.11.3

GLP compliance:

no

Parameter:

other: More sensitive to shock than m-dinitrobenzene

Remarks:

migrated information

Remarks on result:

not measured/tested

Parameter:

other: More sensitive to friction than m-dinitrobenzene

Remarks:

migrated information

Remarks on result:

not measured/tested

Parameter:

other: Explosive under influence of flame

Remarks:

migrated information

Remarks on result:

not measured/tested

Parameter:

other: Explosive (not specified)

Remarks:

migrated information

Remarks on result:

negative (not further specified)

Screening evaluation

No experimental test data according to EU Method A.14 or comparable methods for FAT 40210 are available.

Considering that explosive properties are associated with the presence of certain chemical groups in the molecule, a screening evaluation can be conducted aimed to identify the presence of such reactive groups within the molecular structure harvesting the capability for a rapid high energy release.

According to CLP Regulation examples of groups which may indicate explosive properties are:

-       C-C unsaturation (e.g. acetylenes, acetylides, 1,2-dienes);

-       C-Metal, N-Metal (e.g. Grignard reagents, organo-lithium compounds);

-       Contiguous nitrogen atoms (e.g. azides, aliphatic azo compounds, diazonium salts, hydrazines, sulphonylhydrazides);

-       Contiguous oxygen atoms (e.g. peroxides, ozonides);

-       N-O (e.g. hydroxyl amines, nitrates, nitro compounds, nitroso compounds, N-oxides, 1,2-oxazoles);

-       N-halogen (e.g. chloramines, fluoroamines);

-       O-halogen (e.g. chlorates, perchlorates, iodosyl compounds).

Analysis of the above depicted molecular structure revealed, that at least two azo groups representing chemical alert structures for explosive properties are present in the molecule.

Calculation of the oxygen balance according to the above mentioned formula is -94.20 and therefore, higher than the trigger value of -200 [calculation based on molecular weight of the free acid form].

Determination of the exothermic decomposition energy

In order to assess if the substance FAT 40210 possesses the potential to rapidly release huge amounts of energy a thermal analysis (Differential Scanning Calorimetry) has been performed. The results of the measurement are shown in Annex 1.

The curve displays no exothermic peak up to 250 °C with no energy release. As a result, energy release is below a critical trigger level of 500 J/g and the onset of energy release is below 500 °C.

Summary and Conclusion

In summary, analysis of the chemical structure revealsat least two azo groups being present representing chemical alert structures for explosive properties. The calculated chemical oxygen balance is above the trigger value of -200, but the determination of the exothermic decomposition energy demonstrated an energy release below the critical value of 500 J/g. Therefore, the substance is considered to be non-explosive according to Directive 67/548/EEC and Regulation (EC) 1272/2008 and no further testing is required.

Interpretation of results:

non explosive

Conclusions:

The substance is considered to be non-explosive.

Executive summary:

Analysis of the chemical structure reveals at least two azo groups being present representing chemical alert structures for explosive properties. The calculated chemical oxygen balance is above the trigger value of -200, but the determination of the exothermic decomposition energy demonstrated an energy release below the critical value of 500 J/g. Therefore, the substance is considered to be non-explosive according to Directive 67/548/EEC and Regulation (EC) 1272/2008 and no further testing is required.

Description of key information

Based on a weight of evidence from a read across study, the test item is believed not to be thermally sensitive, not shock sensitive, not sensitive to friction. Moreover, the molecular structure does not contain any functional groups identified in the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, Appendix 6, Table A6.1, as being associated with explosive properties. Therefore, according to Regulation (EC) no. 1907/2006, Annex VII, 7.11, column 2, the study does not need to be performed.

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

A screening assessment to evaluate the explosive properties of the test item has been performed. As a result, analysis of the chemical structure reveals at least two azo groups being present representing chemical alert structures for explosive properties. The calculated chemical oxygen balance is above the trigger value of -200, but the determination of the exothermic decomposition energy demonstrated an energy release below the critical value of 500 J/g. Therefore, the substance is considered to be non-explosive according to Directive 67/548/EEC and Regulation (EC) 1272/2008 and no further testing is required.

In addition, data from a read across study performed on FAT 40821 have been taken into account.

FAT 40821 is not thermally sensitive, not shock sensitive, not sensitive to friction.

Read across with FAT 40821 for the registration of Reactive Black 8 (FAT 40210) is claimed because of the following similarities of the chemical structures:

Both dyes are 1:2 metal complex structures with chromium in the oxidation state +III as central atom and both complexes have in the protonated form one negative charge.

The chemical stability of the two metal complex structures is very similar, because of the similar ligands.

The molecular weight is quite close, and the size of both molecules indicate a very low bioavailability.

Both dye structures contain several sulfo groups, and the dyes are therefore highly soluble in water. Reactive Black 8 is more soluble in water and therefore less critical.

Both dye structures contain two fiber reactive groups. In the case of FAT 40821 one reactive group, the vinyl-sulphone group, is more reactive than the mono-chloro-triazine-groups. Therefore, Reactive Black 8 can be seen as less critical compared to FAT 40821.

 

 

Justification for classification or non-classification

The substance is considered to be non-explosive according to Directive 67/548/EEC and Regulation (EC) 1272/2008 and no further testing is required.