Registration Dossier

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
explosiveness, other
Type of information:
other: Expert Statement
Adequacy of study:
key study
Study period:
2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Expert Statement
Justification for type of information:
None
Qualifier:
according to
Guideline:
other: Expert Statement
Principles of method if other than guideline:
None
GLP compliance:
no
Specific details on test material used for the study:
None
Key result
Parameter:
other: Calculation of the oxygen balance according to the above mentioned formula is -130.61 and therefore higher than the trigger value of -200.
Remarks on result:
not measured/tested

None

Conclusions:
In summary, analysis of the chemical structure reveals no 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 far 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.
Executive summary:

No experimental test data according to EU Method A.14 or comparable methods for Disperse Blue 056 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 no chemical groups representing alert structures for explosive properties are present in the molecule.

Calculation of the oxygen balance according to the above mentioned formula is -130.61 and therefore higher than the trigger value of -200.

In order to assess if the substance Disperse Blue 056 possesses the potential to rapidly release huge amounts of energy a thermal analysis (Differential Scanning Calorimetry) has been performed at the Analytical Department Huntsman Textile Effects (Germany) GmbH. The results of the measurement are shown in Annex 1. The curve displays three exothermic peaks between up to 350 °C with an overall energy release of 73.44 J/g, 1.92 J/g and 56.36 J/g. As a result, the overall energy release in summary is below a critical trigger level of 500 J/g and the onset of energy release is below 500 °C.

In summary, analysis of the chemical structure reveals no 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 far 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

 An expert assessment has been performed: Non explosive 

Key value for chemical safety assessment

Explosiveness:
non explosive

Additional information

In summary, analysis of the chemical structure reveals no 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 far 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.

Justification for classification or non-classification

According to the CLP Regulation (EC 1272/2008), 2.1.4.2. Screening procedure section, the screening procedure is aimed at identifying the presence of such reactive groups and the potential for rapid energy release. If the screening procedure identifies the substance or mixture to be a potential explosive, the acceptance procedure (section 10.3 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria) has to be performed.

Screening procedure failed to evidence any reason for concern, on the basis that there are no chemical groups associated with explosive properties present in the molecule.

In conclusion, the substance can be considered non explosive, according to the CLP Regulation (EC 1272/2008).