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:
2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Justification for type of information:
None
Qualifier:
according to guideline
Guideline:
other: Expert Statement
GLP compliance:
no
Specific details on test material used for the study:
None
Key result
Parameter:
other: 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.
Remarks on result:
not measured/tested

No experimental test data according to EU Method A.14 or comparable methods for Reactive Brown 011 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 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 -105.73 and therefore higher than the trigger value of -200.

Determination of the exothermic decomposition energy:

In order to assess if the substance Reactive Brown 011 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 no exothermic peak up to 350 °C. 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:
In summary, analysis of the chemical structure reveals two azo groups representing chemical alert structures for explosive properties are present in the molecule. 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:

Summary and Conclusion:

In summary, analysis of the chemical structure reveals two azo groups representing chemical alert structures for explosive properties are present in the molecule. 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.

Key value for chemical safety assessment

Explosiveness:
non explosive

Additional information

To assess if the substance Reactive Brown 011 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 no exothermic peak up to 350 °C. 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.

Summary and Conclusion:

In summary, analysis of the chemical structure reveals two azo groups representing chemical alert structures for explosive properties are present in the molecule. 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

In accordance with Column 2 of section 7.11 of REACH Annex VII, the full study has not been conducted as there are no chemical groups associated with explosive properties present in the substance. Therefore, no classification is warranted according to CLP (Regulation EC 1272/2008) criteria.