Sodium bis[N-(2-chlorophenyl)-2-[[2-hydroxy-5-(N-methylsulphamoyl)phenyl]azo]-3-oxobutyramidato(2-)]cobaltate(1-)

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:

03-11-2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Expert statement

Qualifier:

no guideline followed

Principles of method if other than guideline:

Expert assessment

GLP compliance:

no

Parameter:

other: the exothermic decomposition energy

Remarks on result:

other: See remarks

Remarks:

The curve displays one exothermic peaks up to 350 °C with a total energy release of 513.37J/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.

Parameter:

other: Calculation of the oxygen balance

Remarks on result:

other: Calculation of the oxygen balance according to the above mentioned formula is -132.81 and therefore higher than the trigger value of -200

Analysis of the 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 -132.81 and therefore higher than the trigger value of -200. In order to assess if the substance Acid Yellow 116 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 513.37J/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. In summary, analysis of the chemical structure reveals no alerts for explosive properties. The calculated chemical oxygen balance is below the trigger value of -200 and the determination of the exothermic decomposition energy demonstrated no energy release up to 300 °C. 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.

Conclusions:

In summary, analysis of the chemical structure reveals no alerts for explosive properties. The calculated chemical oxygen balance is below the trigger value of -200 and the determination of the exothermic decomposition energy demonstrated no energy release up to 300 °C. 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 Acid Yellow 116 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 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 -132.81 and therefore higher than the trigger value of -200.

In order to assess if the substance Acid Yellow 116 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 513.37J/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.

In summary, analysis of the chemical structure reveals no alerts for explosive properties. The calculated chemical oxygen balance is below the trigger value of -200 and the determination of the exothermic decomposition energy demonstrated no energy release up to 300 °C. 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

Analysis of the chemical structure reveals no alerts for explosive properties.

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 below the trigger value of -200 and the determination of the exothermic decomposition energy demonstrated no energy release up to 300 °C. 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

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.