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Reference
Endpoint:
explosiveness
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Expert statement for explosive properties of FAT 36038/J
Qualifier:
no guideline followed
Principles of method if other than guideline:
Expert judgment based on the screening procedure as described in:
- CLP, Annex I, Part 2, paragraphs 2.1.4.2 and 2.1.4.3
- Appendix 6 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria
- 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
Key result
Parameter:
other: Presence of chemical structures associated with explosive properties
Remarks on result:
other: no structures associated with explosive properties are present in the molecule
Key result
Parameter:
other: oxygen balance
Remarks on result:
other: slightly higher than the trigger value of -200
Key result
Parameter:
other: Determination of the exothermic decomposition energy
Remarks on result:
other: one exothermic peaks up to 350 °C with a total energy release of 229.98 J/g

Screening evaluation

No experimental test data according to EU Method A.14 or comparable methods for Disperse Violet 057 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 such chemical alert structures are present in the molecule.

Calculation of the oxygen balance according to the above mentioned formula is -177.81 and therefore slightly higher than the trigger value of -200.

Determination of the exothermic decomposition energy

In order to assess if the substance Disperse Violet 057 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 one exothermic peaks up to 350 °C with a total energy release of 229.98 J/g. This peak is considered to represent substance decomposition. As a result, the overall energy release is below a critical trigger level of 500 J/g and the onset of energy release is below 500 °C.

Interpretation of results:
GHS criteria not met
Conclusions:
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:

Analysis of the chemical structure reveals no alerts 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) No. 1272/2008 and no further testing is required.

Description of key information

FAT 36038/J TE is considered to be not an explosive.

Key value for chemical safety assessment

Explosiveness:
non explosive

Additional information

Analysis of the chemical structure reveals no alerts 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) No. 1272/2008 and no further testing is required.

Justification for classification or non-classification

The substance was concluded to be not an explosive based on the expert judgment, hence it does not warrant classification as per the criteria of Regulation (EC) No. 1272/2008.