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Physical & Chemical properties

Explosiveness

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Description of key information

Non explosive

Key value for chemical safety assessment

Explosiveness:
non explosive

Additional information

According to the REACH Regulation, Annex VII, Column 2, the study does not need to be conducted if there are no chemical groups associated with explosive properties present in the molecule. The screening procedure, aimed at identifying the presence of certain chemical groups in a molecule which can react to produce very rapid increases in temperature or pressure and the potential for rapid energy release, has not evidenced reasons for concern.

Direct Red 079 contains chemical groups associated with explosive properties, but the exothermic decomposition energy is less than 500 J/g and the onset of exothermic decomposition is below 500 °C. Furthermore this substance is produced and used at the highest level in Europe, transported in ship from outside Europe at various temperature and stoking conditions. Evidences connected to the long experience in handling of the molecule confirm that no explosive properties have never been observed and reported up to now in the usual conditions of production, stock, transport and use.

In conclusion, Direct Red 079 does not meet the criteria to be classify as explosive.

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 Direct Red 079 contains chemical groups associated with explosive properties, but the exothermic decomposition energy is less than 500 J/g and the onset of exothermic decomposition is below 500 °C.

In conclusion, according to the CLP Regulation (EC 1272/2008) substance is classified as NON explosive.