Sodium 2-[[2-amino-8-hydroxy-6-[(methylanilino)sulphonyl]-1-naphthyl]azo]-5-(chloroacetamido)benzenesulphonate

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:

14 November 2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: See remark

Version / remarks:

The screening procedure is 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

Principles of method if other than guideline:

The screening procedure is 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

Parameter:

other: Oxygen balance

Remarks on result:

other: calculated chemical oxygen balance is above the trigger value of -200

Parameter:

other: exothermic decomposition energy

Remarks on result:

other: curve displays one exothermic peak between 190 and 300 °C with an energy release of 262.06 J/g. As a result, energy release is below a critical trigger level of 500 J/g and the onset of energy release is below 500 °C.

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 -137.07 and therefore above the trigger value of -200.

Determination of the exothermic decomposition energy

In order to assess if the substance Acid Red 252 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 peak between 190 and 300 °C with an energy release of 262.06 J/g. As a result, 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 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 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.

Interpretation of results:

GHS criteria not met

Conclusions:

Acid Red 252 is considered to be non-explosive.

Executive summary:

In order to assess if the substance Acid Red 252 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 peak between 190 and 300 °C with an energy release of 262.06 J/g. As a result, 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 above the trigger value of -200, but the determination of the exothermic decomposition energy demonstrated an energy release below the critical value of 500 J/g. Therefore, the substance is considered as non-explosive according to Regulation (EC) 1272/2008 and no further testing is required.

Description of key information

The 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 below the critical value of 500 J/g. Therefore, the substance is considered as non-explosive according to Regulation (EC) 1272/2008 and no further testing is required.

Key value for chemical safety assessment

Explosiveness:

non explosive

Justification for classification or non-classification

Acid Red 252 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.